Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0c3973063c3b3d…

MALICIOUS

PDF

87.0 KB Created: 2021-07-27 14:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 900b229ae714fb9f06ff20a81a6ccc04 SHA-1: a0543262eaa1e34ef6a514c6859b3d9b5828d8b5 SHA-256: 0d0c3973063c3b3d62530ce9af79cb03fc533f39d850477886dce717afdcf0f8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e493830e375---rowomitoporirasezorosagep.pdf In PDF document text
    • https://ville-rouillac.fr/docs/file/30816312567.pdfIn PDF document text
    • http://www.pes.edu.mn/ckfinder/userfiles/files/gozozugeroxenonebeni.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/zadixedutimamibunumabelaz.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/rpmbdf01745dsa3fukco747ga1/13733244823.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc5e79f25d---41572352017.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607528d42837c---gamunatizepafeleduv.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/cempsi861l5ejjs27hmgl7d979/72240829656.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/f8q6um4a7j1lrg3rk9djbk21k1/lalenuliduduma.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd5dc2fe35---mipinebunogoxojiv.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/3138939022ee52e1422d156ffce4dec2/moziwazapije.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/razorirugekeguxanume.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/xojagoforolinoretojutisu.pdfIn PDF document text
    • http://orlickachata.cz/files/files/11718192735.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/dhac61j6ntgkve58vqd32hkv67/pisilezubar.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/3249021882.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/d1ea48cd339676bab8d8fd38d3e21a19/88456970423.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/1984344bf3279598791bb337f8981aa6/saxup.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072093fa3358---rifadoduvava.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/jifomiwosoj.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/mutiwobivoxomimurikigafu.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f29f4e8a1f---86030929364.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/88704861323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+do+christian+premarital+counselingPDF 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_off0000f0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A0 16556 bytes
SHA-256: e2e379845dd0cf5feee060ce3d128307731b154516046f3fbd3ba59b7574793a
font_01_sfnt_off00011b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13399 11140 bytes
SHA-256: ad70a05ea0be1ff7839a7a469430c722e0f0be5d5e57b5a90af2cc4abba1a1f9

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