Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d26f3f9a8560adc…

MALICIOUS

PDF

83.0 KB Created: 2021-03-02 12:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0cc75f2ed0d20a47b591ac36269c6555 SHA-1: f1825c3b1abef8b8a1cf4f3e68b23a2f81a2bfc2 SHA-256: 9d26f3f9a8560adc9a26a926b33bc3d49fa0727260f5965ef443c52f1b4f09f2
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable hosting services. This behavior is indicative of a link farm or SEO spam campaign, potentially used to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8892

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=the+spiritual+man+watchman+nee+amazon PDF link annotation
    • https://cdn.sqhk.co/fotenulutis/cYOYSxh/brand_management_definition_business.pdfIn PDF document text
    • https://buronoveze.weebly.com/uploads/1/3/0/7/130739674/7933426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466367/normal_600e222419b33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488102/normal_5fdfcf2216882.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/gd5dWid/27787012143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_6009ebee5ce3e.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/why_wont_my_lawn_mower_battery_charge.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/3jag8z1/luzarupodotuzajejoniguxob.pdfIn PDF document text
    • https://semirenuzunep.weebly.com/uploads/1/3/5/3/135325284/9922633.pdfIn PDF document text
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/niweduwi-ditomiwe-busatelexel.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/beriv-vipawufu-tesiki.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/9c14b8b7ba933b.pdfIn PDF document text
    • https://gukamixi.weebly.com/uploads/1/3/4/0/134042495/9451727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fc5e9d4937b7.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/gzheOHU/4789929932.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/60408153997.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FC 3892 bytes
SHA-256: 920a16e3f88e2c7d674027ea0e827725a3aaf192dc50876f736ec3cf67e467bb
font_01_sfnt_off00012fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCA 5144 bytes
SHA-256: 80bedf1c483fc2c3da70c8648b0b8bb7c6f694361ceee1db0255b44353bf51c9

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