Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9a2999271bb519…

MALICIOUS

PDF

39.0 KB Created: 2020-04-10 06:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 348275e1c722deefad224b2f3d6fda8b SHA-1: d8a8c449211837b479aa092e5bff653fa3569a99 SHA-256: 0f9a2999271bb5197bb0f262cf3876702dbc940a0dc7c7a98250dffd2682885e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, indicating it functions as a link farm. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting an attempt to manipulate search engine results or distribute malicious content through these numerous URLs. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact nature of the linked content.

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://markmymaintainer.com/uploads/1/3/1/6/131637175/131637175.html#dientes+de+tiburones+ballena
    • http://ladamesophistiquee.com/uploads/1/3/1/4/131452804/towutasunatowupidele.pdf
    • http://reaganandfriends.com/uploads/1/3/0/6/130604350/xadafiwozirav.pdf
    • http://jordannahernandez.com/uploads/1/3/0/7/130775309/pibix.pdf
    • http://fairfieldhomeinspection.com/uploads/1/3/1/4/131410009/zasalo.pdf
    • http://cultivatenext.com/uploads/1/3/0/6/130639939/guwapodakagorow_tibulomatudas_gubami.pdf
    • http://kaderfilm.de/uploads/1/3/0/6/130603783/makexesugije.pdf
    • http://motivationtogrow.com/uploads/1/3/0/2/130287488/692bf6e4.pdf
    • http://suntnorociteru.com/uploads/1/3/0/9/130970005/xesawudavosi-mekumoxaja-rijozuw-metotodu.pdf
    • http://bossbrisbane.com/uploads/1/3/0/7/130739894/505bb9.pdf
    • http://woottenlogistics.com/uploads/1/3/0/2/130291649/5512753.pdf
    • http://newexclusive.net/uploads/1/3/0/8/130814234/kirabunovizam_sebaxopig.pdf
    • http://blerogmbh.ch/uploads/1/3/1/4/131453151/7910494.pdf
    • http://slement.fr/uploads/1/3/0/7/130776795/zilakixolazi.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_off00006e6d.bin
1530cd245a55b9a6e446fe1a8ccb84e46ed5c1cdd96673a599cf23aa40def25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6D 8652 bytes

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