Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1a2f9bd2f9f0ae…

MALICIOUS

PDF

42.1 KB Authoring application: Inkscape
MD5: 04d03056587eae8798fd7f950ea14038 SHA-1: 0b67dbde3e0f59155429747b47ec93457ba96cea SHA-256: 5f1a2f9bd2f9f0aedf326680916ae149368b8baec9139b2c6f6f4ef9f80f28e4
160 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 poisoning or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing and a potential robot installer. The document body contains irrelevant text and embedded URLs, suggesting it is a lure to encourage users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://100percentcajun.com/uploads/1/3/0/4/130476054/gilowuter-subawi.pdf
    • http://hampaidenvalkaisu.net/uploads/1/3/0/6/130639177/4668441.pdf
    • http://mindfulohio.com/uploads/1/3/0/2/130289291/jewasufavulevo.pdf
    • http://youmeandfivebucks.com/uploads/1/3/0/4/130489417/250ba5e.pdf
    • http://mightierthanswords.org/uploads/1/3/0/4/130476309/1648089.pdf
    • http://mr-castironcreations.com/uploads/1/3/0/6/130603814/fozigeveniweru.pdf
    • http://tbkhoneyco.com/uploads/1/3/0/4/130476351/rulupusijil_dodeparoxetop_lejumomujoje.pdf
    • http://parapety-kanclerz.pl/uploads/1/3/0/5/130590195/wadixibefuwonederu.pdf
    • http://caraboo.co/uploads/1/3/0/7/130739094/xalodoz-pepuzivo-limozozepas.pdf
    • http://mworchestra.com/uploads/1/3/0/8/130814992/9206882.pdf
    • http://richardbrooksinvestigations.com/uploads/1/3/0/3/130379141/rutitogusegif_vawuzubuti_porasakote_legan.pdf
    • http://monkeyfolio.com/uploads/1/3/0/6/130639700/valupitufetoron_satesetitege_mevepor_kaxogutadu.pdf
    • http://oakclass.com/uploads/1/3/0/6/130639442/130639442.html#sherlock+the+abominable+bride+movie+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000148a.bin
8e47ef5e74d61c5d49bd11c681f06bacf9ea9a950c4f892bf5587029376c5b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148A 10224 bytes
font_01_sfnt_off0000695c.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695C 2616 bytes

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