Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f065335f653c66…

MALICIOUS

PDF

36.2 KB Created: 2020-04-09 02:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 680e4de71f8b322b903283b23c8582aa SHA-1: 34c066e23944928ea710cc1498c259663991dcd5 SHA-256: 09f065335f653c66d20c704960910e9d7be507992c72d343633b1ca847233560
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a common tactic for SEO poisoning or redirecting users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports this. The document body, though heavily obfuscated, contains URLs that are likely intended to lead users to further malicious content or phishing pages.

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://rallplumbing.com/uploads/1/3/0/6/130604085/130604085.html#sunbeam+mixmaster+heritage+series+2350+manual
    • http://fullserviceinsulation.net/uploads/1/3/0/4/130488395/kavutedixise.pdf
    • http://mitcheinternational.com/uploads/1/3/1/4/131455883/risapad.pdf
    • http://myrolemodel.info/uploads/1/3/0/3/130323161/6878473.pdf
    • http://khsmuse.com/uploads/1/3/0/7/130739156/jukitij-lipasomogebewop-rateximotodukuw-xupejeviwoku.pdf
    • http://kongtiao163.net/uploads/1/3/0/5/130550688/4512238.pdf
    • http://nickmosca.com/uploads/1/3/0/5/130551745/226599ac021a0.pdf
    • http://avancehotelpalmsprings.net/uploads/1/3/0/7/130738603/1553825.pdf
    • http://lonersnomadsmc.ca/uploads/1/3/1/0/131070456/34b47364.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_off00006262.bin
8575d2662d63bb9c3348d6a696aef3fb6ee95a317525d258a9c576e8bb712c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 8228 bytes

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