Malicious PDF — malware analysis report

Static analysis result for SHA-256 086ceb9fc8e78560…

MALICIOUS

PDF

43.8 KB Created: 2020-04-17 23:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 88aa52ec4676392d0df174fbefa9b074 SHA-1: cc205ace992358bd0484c0a8fc3d56370c4da5b3 SHA-256: 086ceb9fc8e7856093752437b0a9c6ca774e1dfa305663e3915ba43f1165bfbf
104 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The document's apparent purpose is to disguise these links by presenting itself as a character sheet, likely to trick users into clicking them. No scripts were extracted, but the extensive use of external links suggests a potential for downloading further payloads or redirecting to phishing sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chewoncakes.com/uploads/1/3/0/3/130324037/130324037.html#dungeon+crawl+classics+0+level+character+sheet
    • http://mbctransformations.com/uploads/1/3/0/6/130639052/riruvepinigidaton.pdf
    • http://thesuicideflowers.com/uploads/1/3/1/1/131163492/9622492.pdf
    • http://paradisecream.ca/uploads/1/3/0/3/130323599/zopex.pdf
    • http://letecfee.com/uploads/1/3/0/9/130969917/nukobolokujag.pdf
    • http://lisadring.com/uploads/1/3/1/4/131406505/bbffa17ec8b3859.pdf
    • http://lgcpressurewashingservice.com/uploads/1/3/0/5/130551311/lenukejavunu_morerijalig_rokavizitel.pdf
    • http://lifeodontoiatriasostenibile.it/uploads/1/3/0/2/130273843/edf53.pdf
    • http://mta-sts.mx.wildedgewoodworking.com/uploads/1/3/0/7/130775968/juzur.pdf
    • http://jennthorpphotography.com/uploads/1/3/0/6/130640097/dedoluxamod.pdf
    • http://leaderaction.net/uploads/1/3/0/5/130547576/8038660.pdf
    • http://kissmistry.com/uploads/1/3/0/4/130483660/8197663.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_off00007f6c.bin
74a1ff6f24ecf1738b411c86dd56367719860ac9bd12ede675af7966b6e880ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6C 8756 bytes

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