Malicious PDF — malware analysis report

Static analysis result for SHA-256 783b2b5a075b1bcc…

MALICIOUS

PDF

35.3 KB Authoring application: PDF Studio
MD5: d558b0ed4be10a5a0c54f9cbab013c4b SHA-1: b876d69708e96f2d03c0027b530984014d41d889 SHA-256: 783b2b5a075b1bcc304f245d80c667946378a52cf382a56c2aa4619c54e2ef94
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, indicating a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure implies a lure to external resources.

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://eaugur.com/uploads/1/3/0/8/130874585/76ac1.pdf
    • http://michaeljcbarlow.com/uploads/1/3/0/6/130603930/4378049.pdf
    • http://savannahsplayhouse.com/uploads/1/3/0/7/130776535/c04c446eda67.pdf
    • http://qpmllccompany.com/uploads/1/3/0/4/130476180/sazuvaful.pdf
    • http://emandlicustomdesigns.com/uploads/1/3/0/2/130274343/4039670.pdf
    • http://roofingshinglesreviews.net/uploads/1/3/0/7/130740210/nupudebagojadul_pozeveni_refuxazunojipom_nimexazut.pdf
    • http://stefanichile.com/uploads/1/3/0/5/130550830/kukob.pdf
    • http://yourfurbaby.com/uploads/1/3/0/4/130483147/9ef26.pdf
    • http://querubicamp.com/uploads/1/3/0/3/130323271/dojedegixazaponex.pdf
    • http://raviniacounseling.com/uploads/1/3/0/3/130313127/puwoxaxu.pdf
    • http://cdubholdings.com/uploads/1/3/0/6/130620971/38dd80cc1c9.pdf
    • http://app-pof.com/uploads/1/3/0/6/130605453/130605453.html#difference+between+bacteria+plant+and+animal+cells

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000340a.bin
b6cd2f1c52576d5e5534d8e2cc6994766a661e6ee1d039d59b6be4e198b04c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x340A 7632 bytes

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