Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baf65866380e34f…

MALICIOUS

PDF

64.5 KB Created: 2021-05-28 04:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3de1e0514e815d2cc8d6b6670f3a04de SHA-1: 6957c5b08185d3cfcae49769543ff799ca78bf85 SHA-256: 1baf65866380e34f1cf85428870fdd0b2bfb5c4ac9a9bf817dc6f629beb5fc06
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and contains what appears to be metadata rather than user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8599

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160810ce3bac3e---medolisalobasilajix.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941f049842c---1892392963.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1bc9ee511a2bc9d9b3f7f21e80d7f78c/60509953755.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed2dcd7bd7---sireliwo.pdf
    • http://littlepearlbooks.in/data/eimages/file/jijevonenupo.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a602362be45---65716184936.pdf
    • https://asset-books.com/userfiles/file/36274970122.pdf
    • https://tort-art.ru/userfiles/file/lejowoba.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/272cf92cfea1906aeb57178d24dd50a6/64827522742.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0171127f4---62667074914.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a697e6d4871---50039877647.pdf
    • http://acecaalcoy.com/userfiles/file/powixos.pdf
    • http://ackerviewguesthouse.com/userfiles/file/77487387045.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/hhivebkgn2oihscmejh3f5dh59/koriw.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af5a54c50b1---35646013813.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077688f4207f---66709552176.pdf
    • http://www.abcklima.hu//data/editorfile/62855785279.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/678171044ce5be54aeddb5c0870da06b/71739348905.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+put+mods+in+minecraft+pe+ipad
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df04.bin
f5cee4ef1c87ddd9a51a7a196ceb1e43e2398446e034620bb12b42d0379ed306		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF04 5320 bytes

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