Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3866ef8606f826…

MALICIOUS

PDF

54.4 KB Created: 2020-06-04 19:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3564c07b2082a1d7aaffb8301b64a7eb SHA-1: d8dc20212ff7ddca73866b7989dd80280a841be1 SHA-256: fd3866ef8606f82639033bcdc171ba9acb57eeff2920a814d3df27480907e288
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a deceptive title and numerous external links, characteristic of a link farm or SEO poisoning attack. The primary URL points to a page with a conspiracy theory theme, likely to entice clicks. The PDF_SEO_LINK_FARM heuristic firing confirms the presence of a large number of external links, indicating a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mail.myfrontierfoods.com/uploads/1/3/0/9/130969418/130969418.html#game+of+thrones+conspiracy+theories
    • http://2c5.undesirable.us/uploads/1/3/0/5/130588280/gajogotefa-tukumexavuvufux-lisinige-lurev.pdf
    • http://krezba.com/uploads/1/3/0/7/130740164/piloka.pdf
    • http://airpass.cz/uploads/1/3/1/4/131436981/70c5e99b4c0.pdf
    • http://ingasbakeshop.com/uploads/1/3/0/7/130739918/mowaxugek.pdf
    • http://patriot-medical.org/uploads/1/3/0/2/130289186/220328.pdf
    • http://ezeeservicesinc.net/uploads/1/3/0/7/130776605/vepemuj.pdf
    • http://mintncraft.com/uploads/1/3/0/7/130776358/8547948.pdf
    • http://coltonshouse.com/uploads/1/3/0/4/130483349/71a5fd93.pdf
    • http://idahosmokedsalts.com/uploads/1/3/0/2/130291040/jadila-ganuj.pdf
    • http://laurajoart.com/uploads/1/3/0/2/130288798/4c7c54906608.pdf
    • http://mail.myfrontierfoods.com/uploads/1/3/0/9/130969418/terms.html
    • http://mail.myfrontierfoods.com/uploads/1/3/0/9/130969418/dmca.html
    • http://mail.myfrontierfoods.com/uploads/1/3/0/9/130969418/policy.html
    • https://lesifax.files.wordpress.com/2020/06/24320057761.pdf
    • https://vegumakelaj.files.wordpress.com/2020/06/divujawetusirupoxeduf.pdf
    • https://zexekiko.files.wordpress.com/2020/06/88688393225.pdf
    • https://simesodut.files.wordpress.com/2020/06/gebizofefi.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_off0000a8af.bin
5b7a624973db8d5d449b76a6a2eedf505d6e67d6a70cb92b0e4129efbdff6d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AF 10816 bytes

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