Malicious PDF — malware analysis report

Static analysis result for SHA-256 7510f3e7440c6487…

MALICIOUS

PDF

73.0 KB Created: 2020-04-11 07:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eb62ea752a34cfd92c58329eab69c67b SHA-1: 9c4c4718fef559a709ca899005ffb81ff2d5c6c5 SHA-256: 7510f3e7440c648757dd61d3fbe980a8d6fafd1e72045175cad8ff31710d64c2
96 Risk Score

Malware Insights

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

This PDF file was flagged by an ML classifier as malicious and contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme. The document body, though heavily obfuscated, contains text related to a 'service manual' and includes URLs that point to other PDF files, indicating a potential effort to distribute or host malicious content. No scripts were extracted, but the presence of numerous external links and the ML classification strongly suggest malicious intent.

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://5pointauto.com/uploads/1/3/0/3/130379315/130379315.html#hotline+fluid+warmer+service+manual
    • http://atcleaningservice.com/uploads/1/3/0/6/130621089/8367973.pdf
    • http://repax.network/uploads/1/3/0/5/130543353/bajomomigitusu.pdf
    • http://guidedastrologyanalysis.com/uploads/1/3/0/4/130435619/suzudodipog.pdf
    • http://vapor-physics.com/uploads/1/3/0/7/130776016/zixigelefujala.pdf
    • http://themainestreetmarket.com/uploads/1/3/1/3/131398567/vesimi.pdf
    • http://mjmentertainconsult.com/uploads/1/3/0/7/130740049/5294382.pdf
    • http://stevecoltrain.com/uploads/1/3/0/9/130969475/majojo_modiwe_xepire_tinese.pdf
    • http://lapistravel.com/uploads/1/3/0/2/130289763/julakut.pdf
    • http://simplyyoursky.com/uploads/1/3/0/4/130435893/764b18c1352720c.pdf
    • http://sanantoniopoolandpatio.com/uploads/1/3/0/6/130620981/c012ab4bc40c1.pdf
    • http://filemirage.com/uploads/1/3/0/5/130540788/d81d27.pdf
    • http://followwanderlux.com/uploads/1/3/1/3/131379221/9834826.pdf
    • http://poemsbyrach.net/uploads/1/3/0/9/130970009/f68df17606c.pdf
    • http://aranmurray.com/uploads/1/3/0/6/130639531/bosetizav.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_off0000f3eb.bin
9788ffafca44229c02baae03e985bf0cbeb41b90578d43e1b1285a240780b078		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EB 9440 bytes

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