Malicious PDF — malware analysis report

Static analysis result for SHA-256 05db988d85397785…

MALICIOUS

PDF

113.7 KB Created: 2021-07-01 14:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 459e58ffb7ec240a38363b0ab2b2923b SHA-1: 31b291facc7dc1527a5d7c644e107aa92a5991f8 SHA-256: 05db988d853977858199b1ee0839477f84d084574365078e9271a3b2f744ad2b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://cructi.ru/uplcv?utm_term=redstone+lamp+how+to+make PDF link annotation
    • https://triangle-electronics.com/assets/userfiles/file/17334443893.pdfIn PDF document text
    • http://moje-stranky.eu/userfiles/file/zofuropodutesejak.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff78a3a120---kezowagetafaxumuxun.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/mapiligilefedeluwa.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/45915304559.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c854b0b38---13477168329.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/digekotimodafisobo.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/981c647e870bb745bf6b4bf68aeb07bb/2024477834.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/75676753996.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4c0cec4e3---74974768501.pdfIn PDF document text
    • https://kede.org/userfiles/file/61523062351.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/63180931231.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/2j10r71el9616n96bce7bmboi2/budil.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b980dc2b324---98981614121.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/somidamafif.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/3f46db55ea18f2528561feeabfd18a70/negexogujoviloxeronob.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd476213cf---89831220679.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/f67c8h3o6n6sg6c9nck5gc40g3/39792273606.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0021c0d8125b5e339f39abc56fac86d4/jejifulerazawowe.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160beea6852018---16721085620.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/99211809654.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158CB 18040 bytes
SHA-256: 5bcaad72eebf0f03d13b5d3b494690660f7dca37cb20e0c63aa15d923abcbafb
font_01_sfnt_off000187c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187C4 10688 bytes
SHA-256: f8110bf2b4b61e4bdf0954f943b9521f67aa597791bb3c935b4dc74c75da6c2d
font_02_sfnt_off0001a030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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