Malicious PDF — malware analysis report

Static analysis result for SHA-256 271324e27a462993…

MALICIOUS

PDF

70.5 KB Created: 2021-06-07 21:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 691a7385c9092f736be3028b85bce18d SHA-1: 58a520295d24bb7a8767087a3df2f109be7fa793 SHA-256: 271324e27a462993077d50f993b482131270008a4c6c73344d0b57acce952426
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm for SEO manipulation or phishing. The primary external URI leads to a suspicious domain, likely intended to host malicious content or redirect to a phishing page. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8212

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/pbw?utm_term=what+is+the+app+to+make+a+cartoon+of+yourself
    • https://cdn-cms.f-static.net/uploads/4496216/normal_5fd3872b91fbf.pdf
    • https://cdn-cms.f-static.net/uploads/4485443/normal_6063876b60673.pdf
    • https://jerolukemotib.weebly.com/uploads/1/3/0/8/130874115/zagakizige.pdf
    • https://cdn-cms.f-static.net/uploads/4406501/normal_605c88124e38a.pdf
    • https://static.s123-cdn-static-d.com/uploads/4376101/normal_60b1021d0a428.pdf
    • https://bomigisojibovo.weebly.com/uploads/1/3/0/9/130969974/najubekujenes-zogijexud.pdf
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5ff9487e649fa.pdf
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/a43938f0d.pdf
    • https://xikeremu.weebly.com/uploads/1/3/4/4/134499192/4599233.pdf
    • https://cdn-cms.f-static.net/uploads/4379859/normal_606df12590f2f.pdf
    • https://xonalofogikovor.weebly.com/uploads/1/3/4/3/134372302/fawasadepiwimawug.pdf
    • https://cdn-cms.f-static.net/uploads/4369330/normal_600e858c85b0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/76db42dc-953c-4774-b841-d0599be28693/11812787311.pdf
    • https://uploads.strikinglycdn.com/files/912cee30-770e-4de7-9490-332333b708bf/iskysoft_dvd_creator_license_key.pdf
    • https://uploads.strikinglycdn.com/files/b40d88d3-4c61-4308-97e3-038b62818eec/yamaha_motif_xf8_price_in_ghana.pdf
    • https://uploads.strikinglycdn.com/files/7e448a3b-7743-4964-8463-dee8d3b205cc/44568369712.pdf
    • http://movapog.pbworks.com/f/tujov.pdf
    • http://kapetipubi.pbworks.com/w/file/fetch/144426462/mit_lock_picking_guide.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd1.bin
00106b7167fe5f8b0294c49ed5da701fb9e759a1caedda23a7986dcba1930808		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECD1 5432 bytes

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