Malicious PDF — malware analysis report

Static analysis result for SHA-256 035d36bc738bef11…

MALICIOUS

PDF

36.9 KB Authoring application: Pdftk
MD5: 4a2fdb7aa9cc8d854807450e3d432a94 SHA-1: 8a6cb55681b05c29fa73157c375fd4a1216c856c SHA-256: 035d36bc738bef110631bfbd780a82b95c9087590c317b4cf4bebb68a3556eb7
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical rule for a link farm and a machine learning classifier, indicating malicious intent. The embedded URLs suggest a distribution mechanism, possibly for SEO manipulation or to serve further malicious content. Although no scripts were explicitly extracted, the nature of the link farm and the ML classification strongly suggest a malicious document, likely delivered as a spearphishing attachment.

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://govgraph.us/uploads/1/3/0/4/130476180/55345fd.pdf
    • http://mordyhandmade.ca/uploads/1/3/0/2/130270991/7385910.pdf
    • http://cshillthompson.weebly.com/uploads/1/3/0/6/130622048/1dd365027.pdf
    • http://choptallybarber.shop/uploads/1/3/0/4/130435555/wukimodifekezilo.pdf
    • http://cnaughty.com/uploads/1/3/0/7/130740433/deketeluvuriv.pdf
    • http://brianoconnell.org/uploads/1/3/0/4/130489019/7596137.pdf
    • http://readytoadopt.ca/uploads/1/3/0/5/130588328/gekebotax.pdf
    • http://mysoundcollective.com/uploads/1/3/0/6/130639230/130639230.html#sympathetic+and+parasympathetic+nervous+system+stimulation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000111e.bin
58a8b0acb47837e0cf4e3dfc66afb3b553f861df7df1072ef84003e14c1f8436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111E 7816 bytes

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