Malicious PDF — malware analysis report

Static analysis result for SHA-256 30784ada7ce9d165…

MALICIOUS

PDF

47.9 KB Created: 2020-05-22 04:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d95fe45b38b220afeaff24442ea3a4 SHA-1: b531b79f471991f3906c578f1078c06ec5765203 SHA-256: 30784ada7ce9d165094b763f2ed6681793dbc0947cbe64c189bc7f1f61bd1296
94 Risk Score

Malware Insights

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

The PDF document is designed as a lure, masquerading as a 'God of War walkthrough'. It contains a large number of embedded links to external PDF files, indicating a link farm or redirection mechanism. The ML classifier strongly flagged this PDF as malicious, and the heuristic rules confirm the presence of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://x0418438xstreamtravel.xsideas.com/uploads/1/3/1/1/131164552/131164552.html#god+of+war+walkthrough+pdf
    • http://thegloriagoldshow.com/uploads/1/3/0/2/130271090/poboxubapebo.pdf
    • http://redneckfest.org/uploads/1/3/1/4/131482931/jobobujomafojafinewo.pdf
    • http://hostmaster.richardsorabji.co.uk/uploads/1/3/0/7/130776795/9454188.pdf
    • http://netgoal.org/uploads/1/3/0/7/130739938/gatanolijagote.pdf
    • http://ayeapril.com/uploads/1/3/1/8/131857476/85fe7bce69.pdf
    • http://digi311.com/uploads/1/3/0/4/130435555/e385765e.pdf
    • http://nznutritionalgoatcompany.com/uploads/1/3/0/5/130588872/nezunelodor_wupaganenosi_nilabofumapomi_borokavuwikilo.pdf
    • http://lendobuttons.com/uploads/1/3/0/7/130776069/folutaji-xajoraziritin-jitikajuwawe.pdf
    • http://amweddingsny.com/uploads/1/3/0/7/130738769/nojavalanum-ravujorepawegob.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_off0000900b.bin
6ae3c3432c8a14f02b55c36cdfeafadab8fa3158597fa42e44572cc258a554dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900B 10780 bytes

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