Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff63995b46b32ee…

MALICIOUS

PDF

86.9 KB Created: 2021-07-18 14:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: fed97c98c3a02dd1bfa9e7a1ddeda262 SHA-1: 7860d881c5dfe0e290b5a2a04bd0302b1721817e SHA-256: 5ff63995b46b32ee976a560020994ebd7a822a47092f8ae2686eb2af3e5117c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beeb4e14d08---18907075673.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/u7iaghfe8birrliher3gskb543/55669677360.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/2596d471eaab2701c63e6c219ec373b1/wininajinuj.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/62920554107.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/6259770889.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/35e92514477c5a6628faf688581b023b/98853686525.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/44462e74a8216d5ee5624930c3d51005/fizofadujifamokidakevo.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d574a7064c---84195941926.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a0dd9c8a1b239434330f27ac7764c2e6/51646558937.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb73a928dd---5940272442.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/82811565547.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/gozusutomozozikujoxosu.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e0d711ffa1df2789e6ed341c7d118238/17636410932.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/53231940511.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/gidirig.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/7515811395.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/cm4bpdt6subtm28vlnr65ddtb7/ranadojelonoxuvitog.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2c2dedd59d370c1c9652f9aa76300402/95966214729.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/339io01hpttldequobt68gp49b/zuduwekelexel.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/29494982917.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/acfd6b3d0d966d3249021a39ce26b3c2/66692592666.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/8be38c4085f8e32559d52c89e4a22ddf/wuzawid.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7acc65414---18890209801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=when+is+trick+or+treat+this+yearPDF 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_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 17748 bytes
SHA-256: 06e62fee8277ff0f5fdfc354e9a045cca4bbfd593691991080c2da4a3b3f697d
font_01_sfnt_off00011ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE0 10480 bytes
SHA-256: 81faec7b30b83c009724c6ff81d195ac6fbb8404c0e9f46d0480e9eb33a6f209
font_02_sfnt_off000134bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1