Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d3207e15b64e52…

MALICIOUS

PDF

44.2 KB Authoring application: Poppler-utils
MD5: 11dfa83fe524c2de845b31e5e3d06b55 SHA-1: 30df5d34924524e4a89dab79f323644af7007977 SHA-256: 33d3207e15b64e5243899aed9cdd935916d8879a1bec66e58bd1c5c31257bebe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links pointing to external PDF files hosted on various domains. This technique is often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery through these linked documents.

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://ninjatechnologies.com/uploads/1/3/0/2/130291433/fewesupufimeriwuned.pdf
    • http://sheriffproperties.com/uploads/1/3/0/5/130588572/f575be28b.pdf
    • http://bulletsandbombs.com/uploads/1/3/0/6/130604675/7447969.pdf
    • http://drugoyvzglyad.com/uploads/2020/01/28/d5cb6a96.pdf
    • http://ourlibertypark.net/uploads/1/3/0/5/130588430/85d51c0.pdf
    • http://jeffstyr.net/uploads/1/3/0/4/130483978/05139194e4.pdf
    • http://cellitelectronics.com/uploads/1/3/0/6/130620561/pozoga-pununukediviv-dowukexoku.pdf
    • http://nangginkui.com/uploads/1/3/0/5/130588957/fifezibip.pdf
    • http://justpujasamagri.com/uploads/1/3/0/2/130272414/b0480949fe4.pdf
    • http://sococreole.com/uploads/1/3/0/6/130640095/totirivif.pdf
    • http://6foot7dave.com/uploads/1/3/0/7/130776147/gadijazakewanos-gupepape-gopibejaxo-tezewibivemov.pdf
    • http://pomov.cc3cc.top/uploads/2020/01/28/7404743.pdf
    • http://b2bmaintenance.com/uploads/1/3/0/4/130476456/130476456.html#hyperthyroidism+in+pregnancy+guidelines+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001338.bin
e1340c1487375a8c50ba845b4e24bbe95e6c9ace4e125be7deac1b8adbdd31f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1338 8280 bytes

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