Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e851527268b20f…

MALICIOUS

PDF

33.2 KB Authoring application: Poppler-utils
MD5: 6545f22581436c1ffaa34701332f67b0 SHA-1: ba066b2817c82ac02ca50c5910cdb4a91c63ec88 SHA-256: 74e851527268b20fd8a280b663e3f2738a0a1a161cbda9314c0d880527f28d66
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also indicate maliciousness, specifically flagging it as phishing related. The embedded URLs likely serve to redirect users to malicious sites or to manipulate search engine results.

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://my.trssociety.ca/uploads/1/3/0/2/130273576/1115014.pdf
    • http://willspointbluebird.org/uploads/1/3/0/2/130271013/959c4e8339.pdf
    • http://wamits.com/uploads/1/3/0/2/130289540/dd408a.pdf
    • http://hollyknoxrhame.com/uploads/1/3/0/6/130620387/4962699.pdf
    • http://wiwesagof.resegua.com/uploads/2020/01/29/e4298ab65efa4.pdf
    • http://azzaziphoto.com/uploads/1/3/0/2/130273610/181710.pdf
    • http://misguidedinthemagnolia.com/uploads/1/3/0/5/130551248/ledikenil_pepifuretituzed_kovusaduxarujav_kotalinobujulat.pdf
    • http://mohammadshehataactor.com/uploads/1/3/0/6/130603976/kujeralozogaz.pdf
    • http://ckpiz.com/uploads/2020/01/28/7655723.pdf
    • https://gakegobadesumes.weebly.com/uploads/1/3/0/3/130323612/1403958.pdf
    • http://naturalraysllc.com/uploads/1/3/0/2/130271224/410ec3aa77b5.pdf
    • http://brandywinetrail.com/uploads/1/3/0/5/130590663/2301176.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/6/130604031/130604031.html#possessive+pronouns+practice+exercis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000131c.bin
95ad4b597740886e4d3a3509e2cba3443b8e311d061955f1f282a48b07ca8576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131C 8188 bytes

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