Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8a1b0369ae5e07…

MALICIOUS

PDF

37.5 KB Authoring application: Soda PDF
MD5: 1cdfe2718010e04736f963c61d86b616 SHA-1: 611c2f5277e51e1610b93262e3c37c6c39fa7adb SHA-256: 5c8a1b0369ae5e0748a5a56b0fec62f3632401ff7c96da31fd998f224970b31c
152 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 PDF files hosted on various domains. This behavior is indicative of a link farm or redirection scheme designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://thetwigwarehouse.com/uploads/1/3/0/4/130488163/kukedipim.pdf
    • http://taocostarica.com/uploads/1/3/0/4/130479513/megon.pdf
    • http://hlfstreetlife.org/uploads/1/3/0/4/130436058/6520972.pdf
    • http://kgwritingservices.com/uploads/1/3/0/4/130489082/figajafonatado_rijofavuvexex.pdf
    • http://heeratees.com/uploads/1/3/0/2/130291591/larigotuwipav.pdf
    • http://summit2summitcoaching.com/uploads/1/3/0/6/130604169/40eb0d.pdf
    • http://betterwiththebible.com/uploads/1/3/0/4/130476180/41790b0a326.pdf
    • http://us.momotombochocolatefactory.com/uploads/1/3/0/4/130476203/130476203.html#bmi+chart+nhs+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001146.bin
6aded09ef1eb04cecaf09aa6614b08e39930f12cdbb310efce6166b7cc4b0787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1146 8272 bytes

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