Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8d84db1d0b53a1…

MALICIOUS

PDF

36.3 KB Authoring application: pstoedit
MD5: 6c83f4842a2a83f65e7974a6808a15e6 SHA-1: 0f0e507d50f7382f7ae8484be396144bf426e67d SHA-256: 6e8d84db1d0b53a1be9c38bba7ff4af4dac721ce9c4982fbf29298383bbfc8f7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to host malicious content. ClamAV and ML classifiers also flagged this file as malicious, specifically identifying it as a phishing or robot-related threat. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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://amybournephotography.com/uploads/1/3/0/4/130436068/4214243.pdf
    • http://elizabethbrowndesign.com/uploads/1/3/0/5/130538838/losopubepev-bepalakefim-segisepin.pdf
    • http://njfamilyphotography.com/uploads/1/3/0/4/130488503/f81dd4f6bb687.pdf
    • http://lakecountyrecovers.org/uploads/1/3/0/5/130589252/4510608.pdf
    • http://magyarmale.net/uploads/1/3/0/6/130620942/1159195.pdf
    • http://noahcaseycounselling.com/uploads/1/3/0/6/130604493/69ac4eb3303428.pdf
    • http://msemmashairgrowth.com/uploads/1/3/0/2/130272600/8b31b.pdf
    • http://bradleypwright.com/uploads/1/3/0/4/130491932/9837297.pdf
    • http://naka-g.creps-inc.jp/uploads/1/3/0/6/130639021/pefaretis.pdf
    • http://trueelegancetransportation.com/uploads/1/3/0/5/130588895/wugilalakof-muzas.pdf
    • http://vigrinhotels.com/uploads/1/3/0/3/130379151/zipegene_wigijefedapuwez.pdf
    • http://playpokeronlineforrealmoney.com/uploads/1/3/0/7/130739697/xuragowe.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/4/130488786/130488786.html#only+tiping+games+com

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001351.bin
49a3a063c3fb9c7c0833bc248a3f5afe74ff3b358c789f05e7a26f22cc168eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1351 8264 bytes

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