Malicious PDF — malware analysis report

Static analysis result for SHA-256 0341f078b3fe756f…

MALICIOUS

PDF

42.5 KB Authoring application: PDFBox
MD5: 0b9e5829adac06baeef8358d67900757 SHA-1: b412048648e205572274dcebfa07c53cdb309df6 SHA-256: 0341f078b3fe756fd8f91203560111543c75cd99f578567cb7dd1938cdbc3020
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified as a link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the sheer volume of external links points to a content-delivery or redirection scheme.

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://obituar.org/uploads/1/3/0/6/130620756/740cdf9e06.pdf
    • https://waxidowuriwu.weebly.com/uploads/1/3/0/4/130483633/nifaw-bikezuk.pdf
    • http://nus.region-26.ru/uploads/2020/01/27/xoparuk-kuwerafepulak-zosiji-renus.pdf
    • http://adaptation2resilience.com/uploads/1/3/0/5/130588424/19721c6692d5.pdf
    • http://tjwallas.weebly.com/uploads/1/3/0/5/130588433/4088485.pdf
    • http://zuxakubof.espace-clientsv3-0range.com/uploads/2020/01/28/1472944.pdf
    • http://masterlibrary-staging.com/uploads/1/3/0/6/130620478/fc51eff6d74f2d.pdf
    • http://keyproserv.com/uploads/1/3/0/5/130588693/pelamegegigunakaditu.pdf
    • http://thehealthtrip.com/uploads/1/3/0/5/130543035/rewovipejuxenofe.pdf
    • https://wovitazepi.weebly.com/uploads/1/3/0/5/130543538/8320757.pdf
    • http://leadsfb.xyz/uploads/2020/01/29/c67a31d303695aa.pdf
    • http://creationsbydanilynn.com/uploads/1/3/0/5/130540420/130540420.html#terraria+nymph+farm+map
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ef.bin
c2e41c14b4e0cd51b9bd586e6ec3e9f7e586e935075bac21f202281cb678289e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF 8528 bytes
font_01_sfnt_off00005f4c.bin
e1413ad118d550d0e248195440d5887053dcce055789891bfad5c7ffff491b51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4C 16136 bytes

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