Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bf23b17d47a286…

MALICIOUS

PDF

43.2 KB Authoring application: Soda PDF
MD5: 300d85b5afba6bdd358e7affdc94daa6 SHA-1: eb288deedfcd36a4d290f3c48151625812d2a4b1 SHA-256: 41bf23b17d47a28698467c9949abba52ddc516367847793b4513eb5412ab8606
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm containing numerous external PDF links. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest a phishing or redirection campaign, aiming to lead users to potentially harmful content. No scripts were extracted from this sample.

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://freeflightforever.net/uploads/1/3/0/6/130621850/sakufumadonebe_kagibibozogekes_bavaxogito_wiradujosadez.pdf
    • http://rhinoscribe.net/uploads/1/3/0/6/130605041/381604e749978.pdf
    • http://asburycropfarm.org/uploads/1/3/0/6/130604645/5378805.pdf
    • http://oakmountainfirewood.com/uploads/1/3/0/4/130476940/dejopenerusugurobo.pdf
    • http://intraterrestrial.net/uploads/1/3/0/4/130436139/6764146.pdf
    • http://cerebromatics.com/uploads/1/3/0/4/130488583/7c691c18a1.pdf
    • http://stylogentlemensweekend.com/uploads/1/3/0/2/130270967/221a8f9c.pdf
    • http://sumner167.com/uploads/1/3/0/8/130814248/katud.pdf
    • http://canbabaoglu.com/uploads/1/3/0/6/130604838/e4c14c4.pdf
    • http://martahewett.net/uploads/1/3/0/4/130476276/senul.pdf
    • http://speakeasyliverpool.com/uploads/1/3/0/8/130815726/kesanenuladom.pdf
    • http://ms-gillespie.com/uploads/1/3/0/7/130775922/pupobelunajemapiniz.pdf
    • http://chaseinsulinbox.com/uploads/1/3/0/7/130739867/pijurusipu.pdf
    • http://archivistar.com/uploads/1/3/0/6/130620845/3036660.pdf
    • http://michaudwellness.com/uploads/1/3/0/7/130739346/130739346.html#ethyl+acetoacetate+density+g%2Fml

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003bf6.bin
4b85b252fb0930251d13e4b7a5199812428ea81938096420badb4bcf8c9824bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF6 3648 bytes
font_01_sfnt_off00004b95.bin
ab24df6662264573bfbec9348d4361ba99f4b6dab865b26085666fdf96a5b963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B95 9244 bytes

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