Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69ff81c4ad48331…

MALICIOUS

PDF

204.4 KB Created: 2021-06-17 08:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 888d0cc275a1d36218eb3600d76eb99c SHA-1: 0adffd3725f520252df4084e5b768c784141ea96 SHA-256: f69ff81c4ad48331b5a0cf6d038a0bca21c7c7755ede6077698b129e5c61f39a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by multiple detection engines, including ClamAV and an ML classifier. It contains numerous links, with one prominent URL leading to a compromised WordPress upload directory. The document body, though heavily obfuscated, appears to be a lure related to song lyrics, likely intended to trick users into visiting the malicious URLs. No scripts were extracted, but the presence of multiple external links suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9615

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://chcial.ru/uplcv?utm_term=chainsmokers+songs+something+just+like+this+lyrics PDF link annotation
    • http://lukoilmarine.com/ckfinder/userfiles/files/rapegupoxumi.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30f1e05662---xitopekekipi.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bad796ea4fd---31316217220.pdfIn PDF document text
    • http://caf-ljubljana.si/docs/12471274320.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/47844855073.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16072ffeb79340---85939371852.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/st30stq3b7nhdo2ug0pvfjjotq/nulanebikevozolimarurovok.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/9883p2dmvobiv24nuds44lr7m7/xitimupasubobijodixadera.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/rolisisir.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b1ef1ee72---82556279062.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160722575b9e35---58505715515.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/ad1f7f22e88572b1d1db225a864d0f5d/makumuwosojowuluga.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee707239ed---takigaxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24E10 54340 bytes
SHA-256: 2aca84cd3a48f49a4b11269ebcabb5b898e3c066a991295b344fccb49d33641e
font_01_sfnt_off0002f017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F017 5360 bytes
SHA-256: 6f3f1a2e95c41acef12e2c809a54916a9804733ca91105655a1adae849ce27d7
font_02_sfnt_off00030234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30234 13060 bytes
SHA-256: f2d365e6e88f4df15c7f987756e663637919452e646edf7f4730f40836932d1f

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