Malicious PDF — malware analysis report

Static analysis result for SHA-256 328e2b443c38602a…

MALICIOUS

PDF

45.6 KB Authoring application: OpenOffice Draw
MD5: 0e4003ec2439073c43a47aa59bd4506e SHA-1: 82f7129a5ebc5694994de97bb73a9db12b3620e4 SHA-256: 328e2b443c38602ad6a6d44cc9fb4e31d25dcc051b6e1cd8a32f3b3259afc3ba
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically related to phishing or traffic redirection. The embedded URLs point to a network of similarly structured PDF files, reinforcing the lure pattern.

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://ddrncboa.com/uploads/1/3/0/6/130604341/3355114.pdf
    • http://thingstodoinhalifax.net/uploads/1/3/0/5/130588718/mibebirovoduwaporeku.pdf
    • http://mirabellchicago.com/uploads/1/3/0/6/130620868/4379356.pdf
    • http://natronacountyclassifiedprofessionalsassociation.org/uploads/1/3/0/3/130323355/wanusezixi.pdf
    • http://gezoz.fabrika-perchatok.com/uploads/2020/01/28/fufet_dofisenubuva.pdf
    • http://mydivinewomb.com/uploads/1/3/0/6/130621749/xobajuzuvasi_zewimakiru_lovenadebarutu.pdf
    • http://svreunion.com/uploads/1/3/0/2/130270979/130270979.html#sugar+alcohol+calories

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001223.bin
4a524581b91094b66d2334b59a7ad55aec77eb77225aefcfb69c485463bb3b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1223 9988 bytes
font_01_sfnt_off00006249.bin
5d7ebd720715cd86529581f1d40cc643f68465477bd430d4be5ff736bc95f798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 16268 bytes
font_02_sfnt_off0000777c.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777C 2652 bytes

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