Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8a8d2d12c914af…

MALICIOUS

PDF

38.4 KB Authoring application: Mobipocket Creator
MD5: cdd476905a477402fdbe961aa97aed76 SHA-1: ceaa79e8f3e627d8da1cd68c84e730231db601d2 SHA-256: 2d8a8d2d12c914afda5a6128b46dbf297f193d1c99acd960d035f863dae261b3
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document body mentions 'Hanging tree piano sheet music' which appears to be a lure to disguise the malicious nature of the embedded links.

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://rebathofsouthlouisiana.com/uploads/1/3/0/5/130551188/c1cbc.pdf
    • http://musicforprospectheights.com/uploads/1/3/0/5/130590169/7515429.pdf
    • http://nice-body.net/uploads/1/3/0/4/130483041/fuviletefi.pdf
    • http://buecard.com/uploads/1/3/0/3/130313488/8990359.pdf
    • http://keramofigu.maxi-shopping.online/uploads/2020/01/29/puwuxavob.pdf
    • http://daciajones.com/uploads/1/3/0/2/130273571/8221287.pdf
    • http://painscripts.weebly.com/uploads/1/3/0/6/130621030/7276c47d.pdf
    • http://shelleyortner.com/uploads/1/3/0/5/130588376/navisaga-mimasoba-jomarexaje-xufajivagom.pdf
    • http://tetodir.u-l.tech/uploads/2020/01/28/6739fb3222cf1.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/6/130604769/130604769.html#hanging+tree+piano+sheet+music

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e7.bin
73ae9b1ae1bd2428aefa1a91c14d9a6e584e0a2112f557a9da65609388bfc979		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7 9508 bytes

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