Malicious PDF — malware analysis report

Static analysis result for SHA-256 5213dfe6eaa3f205…

MALICIOUS

PDF

37.5 KB Authoring application: Pdftk
MD5: 200e563161739c9eff89a823a1863482 SHA-1: 627f644f6bab987f2d3a2cea304b54baadee0b99 SHA-256: 5213dfe6eaa3f205bdd50660c3605b61d81ba46558b56cdb37f9b458576e3c43
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded links likely lead to further malicious content or downloads, as suggested by the 'PDF_SEO_LINK_FARM' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://10maincenter.com/uploads/1/3/0/5/130589102/0e408c388.pdf
    • http://newwomanrebel.com/uploads/1/3/0/2/130289418/bonimi-sujabowexibidip-lebopalajonede.pdf
    • http://u-ehs.com/uploads/1/3/0/5/130551651/dujobetafisivibi.pdf
    • https://pasolujisajeniv.weebly.com/uploads/1/3/0/4/130435777/6385113.pdf
    • http://wrappedupinlove.com/uploads/1/3/0/2/130272856/3ccf69.pdf
    • http://gevalad.nvprint-ug.ru/uploads/2020/01/28/diruku_kawaxewo.pdf
    • http://myvrcpp.com/uploads/1/3/0/6/130639545/3272969.pdf
    • http://661junkhauling.com/uploads/1/3/0/4/130483817/mevokajob.pdf
    • http://centerofpeacefulendeavors.com/uploads/1/3/0/4/130436172/9686378.pdf
    • http://nctopografia.pt/uploads/1/3/0/5/130539035/130539035.html#thyroid+pregnancy+guidelines
    • http://nctopograf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fe.bin
20d73be1de09fe1a8c8a2bb81e128943f8a01827345387340b56584cd7456172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE 8184 bytes

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