Malicious PDF — malware analysis report

Static analysis result for SHA-256 3892c2486c5cfb91…

MALICIOUS

PDF

41.6 KB Authoring application: Karbon
MD5: 9eedc94d3b859e3ff0031564cf9b8a2a SHA-1: 802489a498a0266451eaef11fecb3388d8875ea1 SHA-256: 3892c2486c5cfb91e8a3a2544761369fac891c412d40a576d53ee3f351754a29
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body itself appears to be corrupted or contains obfuscated text, making its specific lure unclear, but the overall pattern points to a link-farming or redirection scheme.

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://turkreads.com/uploads/1/3/0/7/130775563/494c2023bfd3a3b.pdf
    • http://www.rupikaur.info/uploads/1/3/0/9/130969945/7792867.pdf
    • http://ragfirearmsllc.com/uploads/1/3/0/2/130289397/kutusegutam.pdf
    • http://flirtyfemmes.com/uploads/1/3/0/5/130588477/wuvig-rerowavidines-sanulara-xezobuw.pdf
    • http://magick-mart.com/uploads/1/3/0/4/130435751/14773.pdf
    • http://teamfitnessmodel.com/uploads/1/3/0/4/130475936/mazubotuguka_tuwafebebejon.pdf
    • http://lovinghandz13.com/uploads/1/3/0/4/130489833/kemuduxipuvuma-zituzi-vimefaputib-xubifozajitar.pdf
    • http://www.fullpane.ironcastlemarketing.com/uploads/1/3/0/5/130552043/0d0599c29a28.pdf
    • http://mydragonflyartsstudio.com/uploads/1/3/0/3/130379228/9258433.pdf
    • http://techtoberfestoc.com/uploads/1/3/0/6/130620519/dodoberiroleje.pdf
    • http://webmaster.rainiernetworks.com/uploads/1/3/0/9/130969184/finutosupovimuvovovi.pdf
    • http://exquisiteessentials.org/uploads/1/3/0/3/130379380/589e30b765.pdf
    • http://mindfulneuropsych.org/uploads/1/3/0/7/130738707/3988791.pdf
    • http://betterbartlett.org/uploads/1/3/0/7/130776692/sipebelij.pdf
    • http://michaeldeaton.com/uploads/1/3/0/6/130639636/8434271.pdf
    • http://adsl-63-204-18-58.benefitplans.org/uploads/1/3/0/7/130775118/130775118.html#sda+hymnal+with+guitar+chords+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c28.bin
b86b7cd68469e1bd4d5a0add2476f0af2b61a1174c5aeceae7f451883993e3fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C28 7592 bytes
font_01_sfnt_off0000470d.bin
6846d35e01f10d66258628d2aa702cd0fb8f6df27a6db3338f5fc626f889ced0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x470D 8128 bytes

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