Malicious PDF — malware analysis report

Static analysis result for SHA-256 1389a14889466cae…

MALICIOUS

PDF

35.2 KB Authoring application: pstoedit
MD5: f7f3224bf8c6d71a8e687231667d753a SHA-1: 4f45647768a37382b9e60fc70747fdc010355b53 SHA-256: 1389a14889466cae22e78d94e2464e49773241961c5c2a86f66a2c5dbb42c353
192 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a 'SEO link farm', which are likely intended to redirect users to malicious content. The document body, though partially corrupted, mentions 'Caution money form' and Maseno University, suggesting a social engineering pretext. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or downloader variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://aeem.com.au/uploads/1/3/0/5/130540033/9276243.pdf
    • http://arabsinaspic.weebly.com/uploads/1/3/0/4/130479044/7157067.pdf
    • http://miss-america-protest.com/uploads/1/3/0/5/130547527/tazejagelu_supitore.pdf
    • http://janiceandersonmusic.com/uploads/1/3/0/6/130621901/wajebotos.pdf
    • http://mykeenhr.com/uploads/1/3/0/5/130588494/medil-kalemezoluras.pdf
    • http://completecarechiropractictables.com/uploads/1/3/0/5/130540296/dapepapedome_faberakezorupi_mazaxufozina.pdf
    • http://musicresources.church/uploads/1/3/0/5/130538986/77ca2b3.pdf
    • http://shardexplorers.com/uploads/1/3/0/6/130639267/130639267.html#caution+money+form+maseno

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001146.bin
2e422b18d13ec8a51dceb919d5a6cfac9729ac6928fbc66d7c79693d94ccf4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1146 7872 bytes

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