Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7a4bb8710523dc…

MALICIOUS

PDF

34.7 KB Created: 2020-06-04 14:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 136ffde8be1666a4260320e6c8e57c48 SHA-1: 741b84e3797bec5ff2595ce33104d4729fd0e983 SHA-256: 9b7a4bb8710523dce8deaac083a044bd3b1b439496cf32a08f748997fe88707a
94 Risk Score

Malware Insights

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

The PDF document contains a deceptive lure for free 'steven universe episodes' which redirects to a link farm of other PDF files. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a tactic to distribute malicious content or engage in SEO abuse. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://miami.momotombochocolatefactory.com/uploads/1/3/0/6/130604574/130604574.html#download+steven+universe+episodes+free
    • http://clientiregular45.com/uploads/1/3/0/8/130874292/fogetaza_tisekoxodome.pdf
    • http://churchplantercoach.org/uploads/1/3/1/8/131871658/vajiwejotej.pdf
    • http://santanderemprende.com/uploads/1/3/0/5/130539022/a7d808c47.pdf
    • http://balletbelle.co.za/uploads/1/3/0/4/130476332/eef300d.pdf
    • http://gpstulsa.org/uploads/1/3/1/3/131383478/9835220.pdf
    • http://miami.momotombochocolatefactory.com/uploads/1/3/0/6/130604574/terms.html
    • http://miami.momotombochocolatefactory.com/uploads/1/3/0/6/130604574/dmca.html
    • http://miami.momotombochocolatefactory.com/uploads/1/3/0/6/130604574/policy.html
    • https://saxevana.files.wordpress.com/2020/06/29726960020.pdf
    • https://kuzelelete.files.wordpress.com/2020/06/zulomatati.pdf
    • https://rizefoxug.files.wordpress.com/2020/06/42289501235.pdf
    • https://sibuzuvum.files.wordpress.com/2020/06/kawovividivim.pdf
    • https://zamopolowi.files.wordpress.com/2020/06/kexolabonadoxetezudir.pdf
    • https://gukebob.files.wordpress.com/2020/06/nopodilidinamoviraje.pdf
    • https://feruvef.files.wordpress.com/2020/06/52000665474.pdf
    • https://zodukexir.files.wordpress.com/2020/06/kaxegojenedinagu.pdf
    • https://dajofozi.files.wordpress.com/2020/06/jelugorubixopunasigigude.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c0a.bin
660c90327e2af75ede890214b405b336199ed5d2fc2052695183020717f058b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0A 10212 bytes

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