Malicious PDF — malware analysis report

Static analysis result for SHA-256 761d46b19ea0fc1b…

MALICIOUS

PDF

40.3 KB Authoring application: LibreOffice
MD5: 4b43130e280a27bd1a3e179d48ea9382 SHA-1: c826c79d17234da66d6210898330041fdc688809 SHA-256: 761d46b19ea0fc1bff7a71538c04067181d9eb89228dd4964146c4b41dc92470
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical finding for a large external PDF link farm and a high ML score. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' further supports its malicious nature. The embedded URLs likely lead to further malicious content or phishing pages, indicating a phishing or redirection attack.

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://geekthreadz.com/uploads/1/3/0/5/130589401/kajuvebo.pdf
    • http://www.haywoodtailoring.co.uk/uploads/1/3/0/7/130738525/jugavigo.pdf
    • http://stuffpeoplesentme.com/uploads/1/3/0/3/130323449/6093893.pdf
    • http://makingmobilefriendlywebsites.com/uploads/1/3/0/6/130640231/f2dda7d0553f2.pdf
    • http://blatherscatdesign.com/uploads/1/3/0/7/130776449/808543.pdf
    • http://drandrewwalker.com/uploads/1/3/0/7/130775675/728e7030c49191e.pdf
    • http://radiantsoulrecords.com/uploads/1/3/0/6/130605196/1471335.pdf
    • http://zettaverse.net/uploads/1/3/0/2/130271097/43ef3f6f4.pdf
    • http://mjrlashes.com/uploads/1/3/0/5/130540868/divejaxaxavofex.pdf
    • http://www.stevedanarealestateservices.com/uploads/1/3/0/7/130775383/1376056.pdf
    • http://tgyl.org/uploads/1/3/0/5/130540559/mobujumomirusa.pdf
    • http://notaryofnh.com/uploads/1/3/0/3/130379504/relufo.pdf
    • http://woodzendesigns.com/uploads/1/3/0/6/130604179/tagakiwaja.pdf
    • http://bobbydoss.com/uploads/1/3/0/6/130639363/jezodukimagu.pdf
    • http://shoes.boutique/uploads/1/3/0/4/130483550/gomabogufanax.pdf
    • http://positivepottytrainingtips.com/uploads/1/3/0/5/130550966/9e6914c74.pdf
    • http://rimacarving.co.nz/uploads/1/3/0/6/130621840/faxigasakikulate.pdf
    • http://host116.carmichaelnl.com/uploads/1/3/0/7/130738950/130738950.html#preparation+of+ph+3+buffer+solution

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000438b.bin
96b1333d11a065600b8fa139f4b163bebcd9c4b2e873556f1551ac8be18524a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x438B 7180 bytes

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