Malicious PDF — malware analysis report

Static analysis result for SHA-256 d957b367a2426d1a…

MALICIOUS

PDF

28.8 KB Authoring application: pdf-parser
MD5: b0f1eed2c18e4218b3766e8eedd62f9a SHA-1: 108205937505b523085a73978ae05d7a52cb5ed9 SHA-256: d957b367a2426d1aa24aeb69c3bb1f34e931bdc4ef353cb339396e52c53b8c8c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The embedded URLs are likely part of a campaign to redirect users to phishing sites or download further malware.

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://www.welcometothehub.co/uploads/1/3/0/5/130543280/titadovesun.pdf
    • http://caddielands.com/uploads/1/3/0/6/130639129/0ae53.pdf
    • http://luguimaraes.com/uploads/1/3/0/6/130639561/kepitagegedoko.pdf
    • http://rebeccalcabrera.com/uploads/1/3/0/2/130288361/3235aa63.pdf
    • http://www.fortmyersfusion.com/uploads/1/3/0/2/130288492/lelitomitimunu.pdf
    • http://mail.encounterweightloss.com/uploads/1/3/0/4/130489019/nolaxu-dotilib-purinizi.pdf
    • http://analogi.us/uploads/1/3/0/6/130621684/955eb06fa15edf.pdf
    • http://tw-tech.net/uploads/1/3/0/5/130589077/5070313.pdf
    • http://calkni.com/uploads/1/3/0/4/130476859/ledaxusivewakip.pdf
    • http://321markets.com/uploads/1/3/0/6/130604423/tebubixibalogi.pdf
    • http://cpanel.jacquelineclewis.com/uploads/1/3/0/2/130289618/130289618.html#paranoid+black+sabbath+bass+tabs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001cb3.bin
8f041bda9e81ef25594f0b510a90a33dabf9c68bc31ea45bc10cb1036a138103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB3 7020 bytes

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