Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa1fe60b68188d2…

MALICIOUS

PDF

29.8 KB Created: 2020-04-11 13:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 27abeedf475a299e5c75320021690106 SHA-1: 7f05c48755b200e3647b66c5765b4c7c61eff057 SHA-256: 6aa1fe60b68188d2ad4c5504adf14d32c75ff6670b4ea6479282eecf16a057ea
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files with numeric or generic slugs. This pattern is indicative of a link farm or SEO manipulation tactic, often used to host malicious content or distribute malware. The ML classifier also strongly flagged this PDF as malicious.

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://epithia.com/uploads/1/3/0/8/130873947/130873947.html#pelicula+de+frozen+una+aventura+congelada+completa+en+espa%C3%B1ol+original
    • http://glamrocktwistbar.com/uploads/1/3/0/4/130489725/mozokemogufito.pdf
    • http://chefnaces.com/uploads/1/3/0/6/130605077/kipagewu.pdf
    • http://rocklinlandscapers.com/uploads/1/3/0/6/130639051/tobozuzidav.pdf
    • http://hotpotato123.com/uploads/1/3/0/5/130589320/zugabevu.pdf
    • http://laurelbrooknaturalresources.com/uploads/1/3/0/7/130776081/4088674.pdf
    • http://bottomshirts.com/uploads/1/3/0/6/130620853/fagitukonavoxo-jogoniruke-nulija.pdf
    • http://teas-online.com/uploads/1/3/0/4/130475921/jimiroferet.pdf
    • http://robinreitzes.com/uploads/1/3/0/4/130435726/juteranusapi-xasexeputular-kamotokutosav-zalaxo.pdf
    • http://conroewindowcleaning.com/uploads/1/3/0/6/130640079/wupixalikajo_fawokajepogev_pixosapetifavi_kuzilo.pdf
    • http://dvrkbusinessconsultants.com/uploads/1/3/1/4/131454440/zagutobigelipufixof.pdf
    • http://laser-art-residence.fi/uploads/1/3/1/3/131380086/xofefofalegekepovuk.pdf
    • http://ellenslight.com/uploads/1/3/1/3/131384025/surudememez-kemize-zakoneke.pdf
    • http://madeleinefarrelly.com/uploads/1/3/0/7/130738513/80abbe922fbe7.pdf
    • http://funfactorbooth.com/uploads/1/3/1/4/131406855/pixasazama.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_off00004ddf.bin
f936af35783f9fae3c87d17f169af050842dc9fd3be6e76f91ba0a7145a80f14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDF 6596 bytes

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