Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3c513e84b3c02b…

MALICIOUS

PDF

112.4 KB Created: 2021-08-21 06:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b1f599f99395e5960b6b9e7d5b70cacd SHA-1: bd3b89ca7c0fc667536fe46fdb206708cdb2c9d2 SHA-256: 5e3c513e84b3c02ba21adf9e6a41b4af09adc7162a0f9071c5e273a71cd13569
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external sites, many of which appear to be compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of urgency and download button lures further supports the attack pattern of tricking users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9438

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://allytemp.ru/uplcv?utm_term=corel+videostudio+pro+x8+serial+key PDF link annotation
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/4j8v6gor8mmca9h3u3t2jgbbpi/96241602351.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c877a2cf20b---jitobidatabi.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/difemofotoru.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/gopuxufozekabedikonetos.pdfIn PDF document text
    • https://maility.pl_adresuserfiles/file/96519244159.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/kupipojusenusefure.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/pnt559lpklj15dhv2pjeepg9t3/xisinibuxivopubofobozab.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e2e61ec64ab---37967516209.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/16ee07eu2gkqccjo760ij8l1ru/77760921770.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d091b6b35---xifitof.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/33728890007.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/zujobinonawapumuxifivo.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160741e91edac9---fasagipuzuxififipod.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160823b4a0b4e3---fifabafutu.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/malojowiw.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab676605b93---sebepedakop.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/dbbb16918b053208ab4ac38f9a3ef247/71886677013.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/vukoxavidejudetura.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/dhe8fccks8coj3k2r614feumbu/89223912970.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/82407150040.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/0dc08f9c50c84335bcf6c6a7d526a3bc/posaloruzirupumilo.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/3481f717b8935a35ac554ce4be8b9384/33314486702.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/74924511303.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/66b18d4212b5458c6a043789f19e98fb/1701153584.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081169a95d92---91011945914.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160898c72a2e22---xabobogodafabirafolimafi.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/34832949257.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DC 16572 bytes
SHA-256: 172fa40a474b273e337a961e838d5e14c9aecb9d58b04574db163b83d80a620f
font_01_sfnt_off00014c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16438 19448 bytes
SHA-256: c45daa4646dc601e3316993f1bef0f6c0fe265e5d9e9dbaf48e2f959fd7aad00
font_03_sfnt_off000197a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197A6 10992 bytes
SHA-256: 1246e1a321ef932ee8fc67c82fcc07ae8055e1fa0beaee7a78bf99620eea652f

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