Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bac29645ba804ce…

MALICIOUS

PDF

79.0 KB Created: 2021-06-19 12:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f1ddf18fb6c1a4883378436ec32f82cf SHA-1: 112534f9b12b8977cfde2766c51501a7045c695e SHA-256: 7bac29645ba804ced4ca1f8e1fed4f2e995677d6e35e4350ba5d46a296520502
94 Risk Score

Malware Insights

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

This PDF document was identified as malicious by an ML classifier and contains numerous links to other PDF files hosted on various domains. The document body, though heavily obfuscated, appears to be a lure for popular media, suggesting a phishing or malware distribution attempt. The presence of multiple links to potentially compromised WordPress sites indicates a link farm strategy to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8184

Heuristics 4

  • 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 http://casier-a-bouteilles.fr/file/viloza.pdf In PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/9ab4b4b11427052f424b153c75f38d67/48883416148.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/8d2cf3cb3cb551a8d1127bb656af13fa/59276043748.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7a09c24b9d0fa58635f430f3320feb0a/voxotudififorisorataxaj.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/funixibujugerarokaxodu.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/f51bdf1bf541ef726c9744453cd070fe/30170750826.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/ruxonusexurinaz.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/xigidatafibotej.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcae81f0c7---79882356028.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/83bu8514kbthf0vbmnuen832g1/luvalimixexilixexupe.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/50097793283.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fda19770de---bitikoxatexezetev.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb191bcd7---43761709561.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/59570690299.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/3699483138.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a02c05a7da---giroroguligavarisale.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/91f94caf6c0e61b1d44dc7b6c4d1ac08/11983886168.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab82cbcec22---mawalabigemibobuwebidozif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=pirates+of+the+caribbean+mp4PDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE7 5452 bytes
SHA-256: b64fa141c1f8ff6884338ebd215837bf025187f4825552b7b637edbba504bf01

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