Malicious PDF — malware analysis report

Static analysis result for SHA-256 6608742603f1002d…

MALICIOUS

PDF

34.7 KB Created: 2020-03-31 22:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 414d6c3624e123ce7bc6ad611415b509 SHA-1: 0f263699e6947014343cc6788a188e653f8a5f93 SHA-256: 6608742603f1002df6b1996904eea34b05a38b696da7b617026a6fc62b5ab702
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The embedded document body text, though partially obfuscated, contains URLs that are also present in the extracted URL list. The ML classifier strongly indicated maliciousness, and the overall structure points to a distribution or redirection mechanism rather than direct 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://trentriverdesigns.com/uploads/1/3/0/2/130271016/130271016.html#polycom+qdx+6000+manual+pdf
    • http://lookupsc.com/uploads/1/3/0/6/130604785/bufibe.pdf
    • http://kidsotg.com/uploads/1/3/0/8/130874165/747440ce1befb.pdf
    • http://lendasherrell.com/uploads/1/3/0/2/130289209/8515079.pdf
    • http://bookobsessedgirl.com/uploads/1/3/0/5/130539091/a3727a0640ba14.pdf
    • http://nigelfoote.com/uploads/1/3/0/5/130539341/8709686.pdf
    • http://tazjohnsonaudio.com/uploads/1/3/0/2/130272092/razapodojas.pdf
    • http://burkewindowreplacement.com/uploads/1/3/0/3/130379743/25887cc660d0.pdf
    • http://hm3cbd.org/uploads/1/3/0/7/130776239/lenetisako.pdf
    • http://lopezteaches.com/uploads/1/3/0/3/130323555/71129.pdf
    • http://elphceramics.com/uploads/1/3/0/7/130775328/bcb3c16640c1.pdf
    • http://dochuston1.com/uploads/1/3/1/1/131164054/jegojojosus.pdf
    • http://familynutritionandfitness05.com/uploads/1/3/0/5/130544089/zeririzuv.pdf
    • http://deepintel.org/uploads/1/3/0/5/130588806/lafabawozute.pdf
    • http://alexanderrobertmusic.com/uploads/1/3/0/7/130740022/xukeruzojipov_begekevajobax_mafujem.pdf
    • http://savvywomensmartmoney.com/uploads/1/3/0/7/130738846/fowekajodedub.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_off000060c4.bin
53812ba3eeedf9c5a04cbaa14225d301da2b160dca593f59363457530960f4ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C4 6972 bytes

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