Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92457234f9ae5f1…

MALICIOUS

PDF

39.0 KB Authoring application: Scribus First seen: 2020-09-07
MD5: e96d6f65b410b02f87258819e615933c SHA-1: 5522d126f3ebdf33558785d93f96f424c8ee1165 SHA-256: e92457234f9ae5f17f1a16be7e84f1e0a2bfee7c4eb41c23b29d835766e0f4c2
192 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is consistent with a link farm or SEO poisoning attack, designed to drive traffic or distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://alixxpartners.com/uploads/1/3/0/5/130539797/e68b60295.pdf In PDF document text
    • http://kobrathelabel.com/uploads/1/3/0/6/130639294/nuwamibakujimu.pdfIn PDF document text
    • http://carrieannphotography.net/uploads/1/3/0/6/130639326/9003720.pdfIn PDF document text
    • http://directmarketinganalytics.com/uploads/1/3/0/5/130588806/8220bc.pdfIn PDF document text
    • http://mrspaynes.com.au/uploads/1/3/0/7/130739396/7633475.pdfIn PDF document text
    • http://whythedogdied.com/uploads/1/3/0/5/130543188/7385225.pdfIn PDF document text
    • http://regencymorgans.net/uploads/1/3/0/4/130483886/3905414.pdfIn PDF document text
    • http://mtsgreenwood.com/uploads/1/3/0/6/130604049/6540447.pdfIn PDF document text
    • http://shambling-shimmies.com/uploads/1/3/0/6/130620975/22039.pdfIn PDF document text
    • http://12ktrv.com/uploads/1/3/0/6/130621446/5883102.pdfIn PDF document text
    • http://mail.inovamedtech.com/uploads/1/3/0/8/130813314/ece5dec95eefa.pdfIn PDF document text
    • http://peterdoseck.net/uploads/1/3/0/4/130475966/5829028.pdfIn PDF document text
    • http://www.apismellifera2.com/uploads/1/3/0/5/130588318/bee48166.pdfIn PDF document text
    • http://abbotttestprep.com/uploads/1/3/0/3/130323984/264cf3a2fa.pdfIn PDF document text
    • http://pravinya.org/uploads/1/3/0/8/130874634/fejunodutefixif.pdfIn PDF document text
    • http://eventsnewmexico.com/uploads/1/3/0/6/130604049/6991837.pdfIn PDF document text
    • http://professionalrenovationsofhamptonroads.com/uploads/1/3/0/5/130588754/dizoji-soxuvaxomodomew.pdfIn PDF document text
    • http://595corporateparkofcommerce.com/uploads/1/3/0/6/130640003/zubom_lemonitutitak.pdfIn PDF document text
    • http://alliumbatam-v1.devsite-1.com/uploads/1/3/0/6/130621614/130621614.html#ukulele+tabs+chords+chartIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C15 2652 bytes
SHA-256: 1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838
font_01_sfnt_off00003846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3846 8760 bytes
SHA-256: 469716fdf0c169f5c8a21188461af32d03126f837f62258c59ca6ce07fdb441d

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