Malicious PDF — malware analysis report

Static analysis result for SHA-256 614ae84c3816a886…

MALICIOUS

PDF

35.0 KB Created: 2020-04-05 11:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 277e98c83b1bf7e08a837cd42dcb89d4 SHA-1: eae2bca21173b4ae1edc406c02a25b09b0d6a36c SHA-256: 614ae84c3816a8864eaaede240091b2348fa89e2616c178dc190be32d283c2dd
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. The embedded links likely serve to direct users to phishing sites or to download further malware, aligning with a spearphishing attachment attack pattern.

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://globalunitedconsultants.com/uploads/1/3/0/7/130775109/130775109.html#catching+fire+full+book+online
    • http://mrjrealtalk.com/uploads/1/3/0/4/130435654/rujezosuza_fobusugeliw_fotamonoluwume_tezutukafoworuv.pdf
    • http://homegrowncarolina.net/uploads/1/3/0/5/130589064/sikerodufotadiza.pdf
    • http://frankbeanprinting.com/uploads/1/3/0/7/130775751/delud-novux.pdf
    • http://lumierespa.net/uploads/1/3/1/4/131454505/9331919.pdf
    • http://sophisticated-chic.com/uploads/1/3/0/7/130775275/wirep.pdf
    • http://custompilates.net/uploads/1/3/0/8/130813146/tafinemasewukumubut.pdf
    • http://nomancorp.com/uploads/1/3/0/4/130483194/1b39da47a5cd.pdf
    • http://surfrescue.club/uploads/1/3/0/6/130605438/11842af98e42.pdf
    • http://bbrinvestment.com/uploads/1/3/0/5/130550915/85bd5a8.pdf
    • http://junographicshop.com/uploads/1/3/0/2/130289292/xisijokizufule.pdf
    • http://torrespaint.com/uploads/1/3/0/7/130776341/009ea7de7ae22.pdf
    • http://bisonwoodscolorado.com/uploads/1/3/1/3/131398345/4942707.pdf
    • http://pouliot4irmo.com/uploads/1/3/0/6/130620549/tigusavunuxef_tojukobex.pdf
    • http://prolawnstally.com/uploads/1/3/0/2/130272973/wodezaxurunovoruni.pdf
    • http://northernsound.com/uploads/1/3/1/3/131380086/5194697.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_off00006333.bin
395009b27278a3a92fe4d9a2dfe896d0fa3a99d689825e591faf738e890b35bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6333 6980 bytes

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