Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f69be73eb442546…

MALICIOUS

PDF

38.2 KB Authoring application: Pdftk
MD5: 9bd5c3de1b3c050ea18fcdab771d0d50 SHA-1: 1a6042ec80ae0816289f687ae6d74dad2ce5d951 SHA-256: 3f69be73eb442546de4965b75427a8f77c3de634abb8ee9b76f57472df9bd79f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted from this sample, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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://thrivelc.org/uploads/1/3/0/8/130813496/rujekekizuv.pdf
    • http://partnertotalrewards.com/uploads/1/3/0/4/130489431/ravaxop-towezini-todeb-zatejev.pdf
    • http://3amcollage.com/uploads/1/3/0/5/130541745/wukerazasutowesapow.pdf
    • http://www.borderlinesproject.com/uploads/1/3/0/3/130323612/956089.pdf
    • http://designavengers.com/uploads/1/3/0/6/130620889/roniniwatibidexiri.pdf
    • http://ajvincentproductions.com/uploads/1/3/0/8/130815093/divozi.pdf
    • http://brainstemtumorlady.com/uploads/1/3/0/4/130489162/6161edae4f40.pdf
    • http://uniquehomesofwashington.com/uploads/1/3/0/5/130542934/3cf957ec.pdf
    • http://needlefreeconnector.com/uploads/1/3/0/8/130813869/gefuzolejuka.pdf
    • http://dallaslivesinc.com/uploads/1/3/0/6/130620557/ripepulowevup_darosaru_jobapedasi_xagexalipex.pdf
    • http://yamt.org/uploads/1/3/0/3/130323803/xavamojox.pdf
    • http://cupcakeswithanxiety.life/uploads/1/3/0/3/130323789/fujowekogunovawabe.pdf
    • http://ajoyfulword.com/uploads/1/3/0/5/130588721/4553769.pdf
    • http://ultracooltrends.com/uploads/1/3/0/2/130291996/635776.pdf
    • http://colacotwayartstrail.com/uploads/1/3/0/3/130323998/bc2803b1c4cf4.pdf
    • http://stage.clinicalgenomics.com/uploads/1/3/0/7/130740200/4167768.pdf
    • http://visionpolaris.com/uploads/1/3/0/6/130639461/8d2f56dd9da63.pdf
    • http://www.wasbc.net/uploads/1/3/0/7/130775125/ae5428c7d38a.pdf
    • http://mail-autofix4985.birthdoulasofpittsburgh.com/uploads/1/3/0/5/130588653/4064486.pdf
    • http://slpwaboard.org/uploads/1/3/0/4/130490421/d86f4ddf1.pdf
    • http://beaverdamchurchonline.org/uploads/1/3/0/5/130550969/130550969.html#what+are+the+benefits+of+mergers+and+acquisitions+as+forms+of+external+growth
    • http://thrivelc.org/uploads/1/3/0/8/130813496/ru

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000348e.bin
44418e06f30ac49714171c50b664e206885cad5eeee8c799de0200a3b67db71e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x348E 8148 bytes

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