Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc592be62add6cc…

MALICIOUS

PDF

32.3 KB Created: 2020-04-18 04:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 120d7455fd2564d0b510cb23f61d5869 SHA-1: 9bc891a898af20712433c9270aa566fc20db6d15 SHA-256: 8dc592be62add6cccf6fa5bc63f87a2187c90a2eb8475c1566f9f0be3c15f8d7
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a link farm or SEO manipulation tactic, potentially used to distribute further malicious content or to artificially inflate search engine rankings.

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://aventusinflatables.com/uploads/1/3/0/7/130740210/130740210.html#championship+manager+2011+android+apk
    • http://jerusalemsoapcompany.com/uploads/1/3/1/4/131436972/pukemanujolotexaxe.pdf
    • http://farzayee.com/uploads/1/3/1/4/131453048/riviga.pdf
    • http://kpsmusik.com/uploads/1/3/0/6/130639256/sevuxelufug.pdf
    • http://banuelosrealestate.com/uploads/1/3/0/2/130272283/e3435cace49a.pdf
    • http://haileyradlingerfitness.com/uploads/1/3/0/5/130550968/makoso.pdf
    • http://dannyswheeliebigadventure.com/uploads/1/3/0/8/130873846/gumasutot.pdf
    • http://govfilingsonline.biz/uploads/1/3/0/6/130621751/tixalijuzomuvojiki.pdf
    • http://snyderagencytx.com/uploads/1/3/0/5/130589430/jotafexorulenupajomo.pdf
    • http://webnock.info/uploads/1/3/0/8/130873992/dejegolebulenus.pdf
    • http://likolovebites.com/uploads/1/3/1/6/131637219/ee755f8702.pdf
    • http://lakescountryinspections.com/uploads/1/3/0/8/130874352/durusisixiposid-migojide-toxipedogibes.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_off000054d9.bin
ad1dced83c46099136a439fb94e9201b43c56eff7beda78c762bc3ae6658d79a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D9 8352 bytes

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