Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8d72b6fd6aebb5…

MALICIOUS

PDF

85.5 KB Created: 2021-08-04 16:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64b1ccbe9d983b48a903292b1eefc84d SHA-1: bd1dd239ab484a4003b26abf0e14646c64794bc4 SHA-256: ee8d72b6fd6aebb5d55d1d38dc3ad7224f90a9c405539fea5ba3399b42202b06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users into downloading malware or visiting phishing pages. The file's structure and numerous external links align with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=simple+auto+clicker+free+download
    • http://interiorconsignments.com/media/file/37708161945.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/f981ced391b3aedaf4865a8fee3f9e6a/kapatigisikidozinisubiso.pdf
    • http://nature-revive.org/files/file/panafafobazuvu.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5kgjq3l3lauena5s9dqk5vfd30/42753572811.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af6ee519b8---38450361253.pdf
    • http://funperm.ru/content/file/8820744173.pdf
    • http://bjhtdszdh.com/v15/Upload/file/2021713425209315.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908d01c88e8---sanofalarirak.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc8b6ca9fa---nejezejabebukabemodovomu.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607272242bc12---domufogokanisewazikix.pdf
    • http://botosani.ro/img/uploads/file/jajevaba.pdf
    • https://kiaavcilar.com/upload/ckfinder/files/fibusepakiko.pdf
    • https://sgicorp.com/userfiles/files/18432211745.pdf
    • https://scalping.ir/data/files/file/41370681948.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/qoquies6nmi8g8kf5ntiuk3s23/44288862628.pdf
    • http://honda-vo.com/upload/file/14657612054.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/rlrrlapbh2h1o4sb3uljnllrk3/80340304428.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59fcb44081---88576631800.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/c222d4755be00bf4e2b6bd884d001355/nozododifelasixiriwi.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16105955de3247---79742407171.pdf
    • https://stijsr.com/userfiles/file/kajudukusujofiserevuze.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/o5abpb0de17egvka4582id9f7l/30403764256.pdf
    • http://dzbnf.com/upload/file///11209062942.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b11d4d1ca5b---mixamipepitotujutozub.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf2.bin
d776d701c9a054f750180991c1848102d7c6bfc9bde1338263dce8722da7bbdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 16884 bytes
font_01_sfnt_off000116da.bin
46378e4bcafe389f29cd8bc7c72d8c4c28ca2d92a164a265075ee3e22ad86a4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 10964 bytes
font_02_sfnt_off00013057.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13057 16792 bytes