Malicious PDF — malware analysis report

Static analysis result for SHA-256 aace5ededb9a00b3…

MALICIOUS

PDF

43.3 KB Created: 2020-03-15 10:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c0fc0951bb7f06c3a0639146c7824733 SHA-1: 37101e1e53660f3ff96c2523fe60a82a5747044e SHA-256: aace5ededb9a00b34f71144d41e616b3188a4fbd2d1155b2d1554a995e3262a2
92 Risk Score

Malware Insights

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

This PDF document is identified as malicious by an ML classifier and contains a large number of external links, many of which point to other PDFs. The document body suggests it is a 'visual novel reader guide', likely a lure to encourage users to click on the embedded links. The primary attack pattern involves directing users to a network of SEO-optimized websites, potentially for further exploitation or content delivery.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kelbels.org/uploads/1/3/0/6/130604181/130604181.html#visual+novel+reader+guide
    • http://miriellemusic.com/uploads/1/3/0/6/130639278/c4923dabacc2acd.pdf
    • http://tcmr-advogada.com/uploads/1/3/0/7/130775974/5482006.pdf
    • http://www.summerhouseco.net/uploads/1/3/0/7/130776138/domezisawetidekef.pdf
    • http://www.blingafied.com/uploads/1/3/0/7/130776213/dirajumubuzara_bupilewed_tujukonaxab.pdf
    • http://www.advancedgarments.com/uploads/1/3/0/6/130621342/puvifobomosesoma.pdf
    • http://pan-education.com/uploads/1/3/0/6/130640163/96b726daa.pdf
    • http://thenakedgoatcafe.com/uploads/1/3/0/8/130874141/f4fcc55a4a282e.pdf
    • http://johorswimming.org/uploads/1/3/0/5/130589098/berogopifuvaf.pdf
    • http://laurielyons.net/uploads/1/3/0/7/130739806/30787.pdf
    • http://alphegapharmacy-dacgroup.com/uploads/1/3/0/7/130739348/kokilugu.pdf
    • http://crossoverhorsemanship.com/uploads/1/3/0/5/130543467/3039622.pdf
    • http://fbcwartburg.org/uploads/1/3/0/5/130540197/00e78a00f.pdf
    • http://www.iscaales.co.uk/uploads/1/3/0/3/130323237/5224466.pdf
    • http://dronecameraspain.com/uploads/1/3/0/8/130813496/gibiwilime.pdf
    • http://gap.chirogust.be/uploads/1/3/0/4/130476368/miximiko_piredume_gibineredejeza.pdf
    • http://danielojones.com/uploads/1/3/0/7/130776776/tufuwo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007048.bin
8e0107eebff83fb62b47f09f2b84b8ff46f72ff991be5ced26ec9f878da238b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7048 8616 bytes
font_01_sfnt_off00009107.bin
a5b239e484ef19c672ac3935e44fabb2c1f47df2a8e879101227664a27174ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9107 4688 bytes

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