Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e265ecd33277ee…

MALICIOUS

PDF

33.1 KB Authoring application: Solid Converter PDF
MD5: c3613603278143ce52758ea20a108a69 SHA-1: cbd7c8328699a71df05c09799156583c6cab10c9 SHA-256: 85e265ecd33277ee9ff4d08f8ac05f9f7be66f1abe0a067fafe53765f5e479f6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, and the document body was heavily obfuscated, but the primary attack pattern involves redirecting users to a network of external resources.

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://kayakadventuregear.com.au/uploads/1/3/0/6/130620524/3301357.pdf
    • http://dearbornpainterpros.com/uploads/1/3/0/6/130622111/4947528.pdf
    • http://lesslessmoremore.com/uploads/1/3/0/5/130551467/3802099.pdf
    • http://mlp-losses.com/uploads/1/3/0/2/130287886/fe1f4bae7e04586.pdf
    • http://planettammy.com/uploads/1/3/0/7/130739431/jopamadafemu.pdf
    • http://moneytree101.org/uploads/1/3/0/7/130776617/3116406.pdf
    • http://dentalqueencreekaz.com/uploads/1/3/0/6/130620669/9b847e5629.pdf
    • http://madeformorecreations.com/uploads/1/3/0/5/130550693/7663486.pdf
    • http://penninsulatech.com/uploads/1/3/0/2/130270753/9e94f.pdf
    • http://arya.world/uploads/1/3/0/8/130814133/7781296.pdf
    • http://100limites.org/uploads/1/3/0/7/130740184/130740184.html#qualitative+data+analysis+miles+huberman+saldana

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b88.bin
76c1793719f899477506d112d6548fcd427d9d636ad959b8dbaf2d71aac5a360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B88 7948 bytes

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