Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf2f82d091e045d…

MALICIOUS

PDF

40.5 KB Authoring application: Pdftk
MD5: 240c80102dad1149beed8ff7f4e8e29e SHA-1: 1e0d7da336dece2dae99bef9a6b5ce2173f97284 SHA-256: 2bf2f82d091e045d54e89f163b12950e42e3fc042f6511505f650855f98e67fa
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary heuristic identified a large number of external links, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains references to 'necrotic enteritis' and includes numerous URLs, reinforcing the link farm hypothesis. The presence of embedded URLs and the overall structure strongly suggest this PDF is designed to lead users to external, potentially malicious, content.

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://benjaminburnham.com/uploads/1/3/0/2/130291591/weguromun.pdf
    • http://mavap.photorobots.com/uploads/2020/01/29/d48f63e91f4f32.pdf
    • http://cad-drafting.net/uploads/1/3/0/6/130620701/1672739a.pdf
    • https://wuvepineb.weebly.com/uploads/1/3/0/6/130605135/9276588.pdf
    • https://nunalaresuzew.weebly.com/uploads/1/3/0/2/130287504/kamujararad.pdf
    • http://ministryofmixology.com/uploads/1/3/0/6/130639990/bezukosoloxazi_vajoru_pazeledikikole.pdf
    • http://novusatelier.com/uploads/1/3/0/4/130476262/26ed8.pdf
    • http://asthethirdworldinnorthamericaturns.com/uploads/1/3/0/5/130588727/5291941.pdf
    • http://flykingzcollection.com/uploads/1/3/0/2/130270900/joboforetawugop_mikuziferofivil_bakif_saxagasazezuto.pdf
    • http://bamboohealthsocks.com/uploads/1/3/0/4/130435925/xiraboluba.pdf
    • http://3170gordondrive.com/uploads/1/3/0/6/130604083/130604083.html#necrotic+enteritis+in+poultry+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000130f.bin
c8b7e8833882b600a3c8d30ffff2fabed24bdefc4a76bb00aecf98e2227d41fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F 9112 bytes

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