Malicious PDF — malware analysis report

Static analysis result for SHA-256 661a27b306ea7cab…

MALICIOUS

PDF

57.3 KB Created: 2020-03-24 08:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0d907a2d7650e88447152ef6c3976caf SHA-1: d1c3498ec17778278fa95967567cbfcfcd242af1 SHA-256: 661a27b306ea7cabc62245bd41548cd91e843ce7f92b80adba1abfb480d911c0
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, identified as a link farm, and uses invoice-related language to lure users. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the 'invoice lure' heuristic suggest the document is designed to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://poweredbytheblueoval.com/uploads/1/3/1/0/131070236/131070236.html#tcode+for+vendor+wise+purchase+order
    • http://www.diversityaccesspipeline.com/uploads/1/3/0/3/130323538/9533178.pdf
    • http://frankgamboaelcapitan.com/uploads/1/3/0/3/130323697/7815869.pdf
    • http://justtalkingoutloud.org/uploads/1/3/0/7/130775612/f9d932.pdf
    • http://www.trimindmedia.com/uploads/1/3/0/5/130546804/lokuwijufug.pdf
    • http://tourswithjulez.com/uploads/1/3/0/3/130323532/nukapuw.pdf
    • http://mail.abramelin.it/uploads/1/3/0/6/130620752/fosevevixovitig.pdf
    • http://bookwormgames.net/uploads/1/3/0/6/130605254/6922586.pdf
    • http://tabletopmatters.com/uploads/1/3/0/7/130738646/45eb6eb29dc1a0c.pdf
    • http://iam-very-hungry.com/uploads/1/3/0/7/130776775/762cc9bc.pdf
    • http://www.boyoodie.com/uploads/1/3/0/4/130435556/9451226.pdf
    • http://www.waisolutions.com/uploads/1/3/0/2/130272585/julesidag.pdf
    • http://silvertipgroup.com/uploads/1/3/0/3/130323892/e935b66de.pdf
    • http://bathcorporateactivities.com/uploads/1/3/0/6/130605135/sewimukubopogi.pdf
    • http://usatfregistration.com/uploads/1/3/0/4/130435753/dodalomiwu.pdf
    • http://mustaren-farmarik.sk/uploads/1/3/0/2/130274145/bujok.pdf
    • http://www.fpworksforyou.com/uploads/1/3/0/4/130488759/xomeni.pdf
    • http://2ourhealth.net/uploads/1/3/0/7/130776735/regaz_gomokisiteba.pdf
    • http://mihmakeithappenconstruction.com/uploads/1/3/0/5/130551033/wukuzebafusenuzezak.pdf
    • http://xinpujingyulechengguanfangdizhi.f18.ebkf.org/uploads/1/3/0/4/130483819/datawedu-fowepemizo-seson-zewowugukojuli.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_off0000b68c.bin
0bcf2cb2fbb3bf782fc56a4848a012742adbd665a37301518cc827a44741b8a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB68C 8648 bytes

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