Malicious PDF — malware analysis report

Static analysis result for SHA-256 80203a60ebd8d889…

MALICIOUS

PDF

78.8 KB Created: 2021-07-13 08:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8f978a701be2ab0c98f1a673fbe98c66 SHA-1: cda3b96afd878d4299f89974f06d1d579f56216c SHA-256: 80203a60ebd8d889d705a418a53dca1d7834d68acd5a19627fe669a6f28c1ab2
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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.
  • 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 http://www.motionmantra.com/userfiles/files/jepuwef.pdf In PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2f0a96d47508188b2bc45f3e9210b74f/siroz.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/veliladimaso.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/73cdc1ab391f82516cd4697e8b058d48/bejiketosufewolawutoze.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/kifup.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/82486752324.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083537dae332---setolajipifumakapekenigaf.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/fd8d82206fc23f1b5388e4e5f88800f3/jebuzomijubovowoxegoxodip.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/95053000880.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/3425224291.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49a095ca65---15710124712.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/wozowapipilawa.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/19633250731.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/58489468727.pdfIn PDF document text
    • http://babamoleskine.com/files/file/xibumesi.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/vulidamubaje.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/96763613910.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/v0o9rm1t6o0t354npsdug8f295/70669697722.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/tasogerigor.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/8lbnfadne1asqb44s6ckl65ftq/dumukawoluxowozonorirobeb.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/3au4cavhct328341n8acolfnm7/42301807828.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/jowojarefokunoli.pdfIn PDF document text
    • https://puntoagricoltura.it/file/32585441080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=convert+office+document+to+pdfPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D6 16708 bytes
SHA-256: 86dbcbce27ab9275bb4c74a7deb0731d22e15681ed4adc43552d766d05682efe
font_01_sfnt_off0000fd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 10604 bytes
SHA-256: 6bf218998cb712210ea7e282d523eb02618fa12538f51bd07507dacb859cede6
font_02_sfnt_off000115c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1