Malicious PDF — malware analysis report

Static analysis result for SHA-256 1044f5b792c2aa15…

MALICIOUS

PDF

39.4 KB Authoring application: Nitro PDF
MD5: 82231f10df5279a8a9befafa0a718156 SHA-1: 6e16197b2d6fac32063a411f0e25413196b0d51d SHA-256: 1044f5b792c2aa15c76476d7b080efc58c60fa61d5cbf128ff0d20a250c27345
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs pointing to other PDF files, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO-based malicious campaign.

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://mx.brisenodds.com/uploads/1/3/0/5/130543598/6857401.pdf
    • http://hotel-art.net/uploads/1/3/0/4/130436093/418082.pdf
    • http://portfoliolaura.com/uploads/1/3/0/7/130776642/6135491.pdf
    • http://www.concretejoliet.com/uploads/1/3/0/5/130588477/zamele-zugizunezakubi-zikujajub.pdf
    • http://relianceauto.org/uploads/1/3/0/6/130604878/mawapowipapel.pdf
    • http://alphatutors.com.au/uploads/1/3/0/6/130640092/suloka-wumagifirono-damofa.pdf
    • http://saferpractice.org/uploads/1/3/0/4/130483300/c2642b5e5.pdf
    • http://cashmerecanada.ca/uploads/1/3/0/4/130476523/3fa8ba.pdf
    • http://agcomllc.net/uploads/1/3/0/4/130483578/gakomutut.pdf
    • http://smpleecleaning.com/uploads/1/3/0/3/130323311/9540964.pdf
    • http://connectumarriageministry.com/uploads/1/3/0/5/130588430/9fe9d9868fe.pdf
    • http://waygonebook.com/uploads/1/3/0/6/130639038/8462489.pdf
    • http://therustywagon.org/uploads/1/3/0/6/130620736/354b8.pdf
    • http://mosaicelephanttraders.org/uploads/1/3/0/6/130621209/bamarugal-jetut-dodegu-ladewu.pdf
    • http://hemmisong.com/uploads/1/3/0/4/130483187/4517597.pdf
    • http://myexpatsuper.com/uploads/1/3/0/8/130814644/zujemidamewu.pdf
    • http://2clearlycharming.com/uploads/1/3/0/3/130379653/fosureb-ramowovukap.pdf
    • http://wondrousnap.com/uploads/1/3/0/5/130589238/37d63858dd50a6.pdf
    • http://folkscore.com/uploads/1/3/0/4/130476632/7651078.pdf
    • http://ahjf4ew.brdge.org/uploads/1/3/0/4/130476263/130476263.html#airtel+my+plan+219+royal+hd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a7a.bin
c2f45d63647a02e2487107d458cfd11b5a09fd490574ab0e2d3aeea29980df0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A7A 8412 bytes

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