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) First seen: 2020-09-24
MD5: c0fc0951bb7f06c3a0639146c7824733 SHA-1: 37101e1e53660f3ff96c2523fe60a82a5747044e SHA-256: aace5ededb9a00b34f71144d41e616b3188a4fbd2d1155b2d1554a995e3262a2
96 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 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 PDF link annotation
    • http://miriellemusic.com/uploads/1/3/0/6/130639278/c4923dabacc2acd.pdfIn PDF document text
    • http://tcmr-advogada.com/uploads/1/3/0/7/130775974/5482006.pdfIn PDF document text
    • http://www.summerhouseco.net/uploads/1/3/0/7/130776138/domezisawetidekef.pdfIn PDF document text
    • http://www.blingafied.com/uploads/1/3/0/7/130776213/dirajumubuzara_bupilewed_tujukonaxab.pdfIn PDF document text
    • http://www.advancedgarments.com/uploads/1/3/0/6/130621342/puvifobomosesoma.pdfIn PDF document text
    • http://pan-education.com/uploads/1/3/0/6/130640163/96b726daa.pdfIn PDF document text
    • http://thenakedgoatcafe.com/uploads/1/3/0/8/130874141/f4fcc55a4a282e.pdfIn PDF document text
    • http://johorswimming.org/uploads/1/3/0/5/130589098/berogopifuvaf.pdfIn PDF document text
    • http://laurielyons.net/uploads/1/3/0/7/130739806/30787.pdfIn PDF document text
    • http://alphegapharmacy-dacgroup.com/uploads/1/3/0/7/130739348/kokilugu.pdfIn PDF document text
    • http://crossoverhorsemanship.com/uploads/1/3/0/5/130543467/3039622.pdfIn PDF document text
    • http://fbcwartburg.org/uploads/1/3/0/5/130540197/00e78a00f.pdfIn PDF document text
    • http://www.iscaales.co.uk/uploads/1/3/0/3/130323237/5224466.pdfIn PDF document text
    • http://dronecameraspain.com/uploads/1/3/0/8/130813496/gibiwilime.pdfIn PDF document text
    • http://gap.chirogust.be/uploads/1/3/0/4/130476368/miximiko_piredume_gibineredejeza.pdfIn PDF document text
    • http://danielojones.com/uploads/1/3/0/7/130776776/tufuwo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7048 8616 bytes
SHA-256: 8e0107eebff83fb62b47f09f2b84b8ff46f72ff991be5ced26ec9f878da238b4
font_01_sfnt_off00009107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9107 4688 bytes
SHA-256: a5b239e484ef19c672ac3935e44fabb2c1f47df2a8e879101227664a27174ed4

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