Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b45697ff137a79…

MALICIOUS

PDF

38.4 KB Authoring application: GIMP
MD5: 2d8c2626046f1a83bd083dcfe4f64f4a SHA-1: bf790b04229b91ae7999c5409059ba5f8328709c SHA-256: 58b45697ff137a793d851ceab52b14fe797b72eaa2c5bc8e589782d56b19666c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique commonly used in SEO poisoning attacks to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to pension rules to entice users to click the embedded links.

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://joyfullnight.com/uploads/1/3/0/2/130287946/gejasilisazusut.pdf
    • http://louisagdesign.com/uploads/1/3/0/6/130621407/4c82245.pdf
    • http://sligergames.com/uploads/1/3/0/6/130640159/3307216.pdf
    • http://quotex.fr/uploads/1/3/0/6/130620965/koremokoxinumaj.pdf
    • http://brandexa.net/uploads/1/3/0/6/130621101/botenunulomidivawok.pdf
    • http://ashleynboyd.com/uploads/1/3/0/4/130436018/53dda.pdf
    • http://5pointauto.com/uploads/1/3/0/6/130639545/130639545.html#andhra+pradesh+revised+pension+rules+1980+in+telugu

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010c7.bin
53d7715505c5834bc7cefc1bd7af4adec0a5df66a65f784eb0943ec76f145fee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7 8196 bytes

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