Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcd60fed31e7ecc…

MALICIOUS

PDF

103.9 KB Created: 2021-07-20 13:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20e0de6ae149272e9bb068d8c0370c0b SHA-1: 40e9299b9f77b7394eb85daedc145a2eef1905c9 SHA-256: 8dcd60fed31e7eccfc62b5689fd7e8452c66e9e194bc16f0a21b46e2434db0d9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as a high-risk advance-fee scam lure. It contains numerous links to disposable hosting and compromised CMS upload storage, suggesting it is part of a larger phishing infrastructure. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pc75.net/upfiles/file/1624260770.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0664eca5f---40262774296.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/tbr4f3guncp3ci3orl9ihv9vo4/tosaladonipod.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810ecd2ab45---vokeroxusupizarepaf.pdf
    • https://kenkochaya.com/user_data/ckfinder/files/bumuje.pdf
    • https://antae.be/app/webroot/uploads/file/66471463149.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/4a53172029d0dbfd42b643538501d276/5304405130.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc009b0871---95701017496.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077f2e2a7954---31088230096.pdf
    • http://commune-bourre.com/userfiles/file/82064117739.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/85jm6eu7sh00fv3nmir9seep9o/detogukonevawajojesokabo.pdf
    • https://tecnibat.net/uploads/archivos/zimegowarotob.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/b9bedef6b116e5f90c4da15f5193027d/sepinez.pdf
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/wogowab.pdf
    • http://agnieszkapawlik.com/userfiles/file/sewux.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730e4191ef7---xevefefigivula.pdf
    • http://st-johnson.com/Uploadfiles/files/97815650785.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c1c4e6843---10437444633.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160722d23757d7---vuzovariwiba.pdf
    • http://www.findvoters.com/userfiles/file/56142701285.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/105f7bb53e2b6daba3f4a453a67cd38a/59423967909.pdf
    • http://westernstudioservice.com/admin/userfiles/file/xuvadowoxududavowetibod.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080af69265b0---murav.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=funnest+quests+in+skyrim
    • 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_off00013633.bin
de368c26c88bbfc7c2bd64471bd90ac6061ad62d7c43da620d5abb584b98adf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13633 10372 bytes
font_01_sfnt_off00014dac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAC 16792 bytes
font_02_sfnt_off000165be.bin
090375b8a86f016c2a70c38497be327a286bb3f2f6ee090879f1b163c1afa558
pdf-font-stream PDF embedded font (sfnt) at offset 0x165BE 17188 bytes