Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b17996b85c22dfd…

MALICIOUS

PDF

47.5 KB Created: 2020-03-30 11:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0a2760481c3ab21ce1367f4da082fc08 SHA-1: 46ba0e82a18678204ea08417226f9012b67f0a55 SHA-256: 9b17996b85c22dfd5fd1749005a14c207c8102d7863bd81115df6cc295640a22
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or a mechanism to distribute malicious content across many sites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated, but the heuristic findings clearly point to a malicious intent focused on redirecting users to external resources.

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://eshibofengyunzuqiu.br3h.com/uploads/1/3/0/6/130621123/130621123.html#oregon+scientific+classic+projection+alarm+clock
    • http://mosoycollection.com/uploads/1/3/0/7/130775376/vemajumedisora.pdf
    • http://racomi.com/uploads/1/3/0/8/130813888/zomomividixu_mazonopagabawaz.pdf
    • http://eliteestatesales.info/uploads/1/3/0/2/130272577/zafinepixedeni.pdf
    • http://rachelsweetcreations.com/uploads/1/3/0/4/130483781/wejetakukokegalu.pdf
    • http://myrichardsonrealty.com/uploads/1/3/0/2/130287942/dfb10.pdf
    • http://discountwiresupply.com/uploads/1/3/0/2/130273752/39966691d0e4beb.pdf
    • http://georgere.com/uploads/1/3/0/7/130776405/23177a7.pdf
    • http://ruraldesignco.net/uploads/1/3/0/7/130775511/varutifupi-nigitejiv.pdf
    • http://angelsathomeclean.com/uploads/1/3/0/4/130489563/wusufisal_badowalerix_vafevozib.pdf
    • http://harolynshobbyhouse.com/uploads/1/3/0/2/130270918/nenadafepulal.pdf
    • http://spinorth.net/uploads/1/3/0/7/130776883/9402837.pdf
    • http://images-wc.com/uploads/1/3/0/6/130620644/vorafegojax.pdf
    • http://privateiheadquarters.net/uploads/1/3/0/6/130620972/vadidefudimu.pdf
    • http://secretlifeofcanada.com/uploads/1/3/0/7/130740573/4725578.pdf
    • http://janikingcars.com/uploads/1/3/0/6/130621412/jogunositatogavifiko.pdf
    • http://thewomensdefensenetwork.org/uploads/1/3/0/6/130605115/4c163ee.pdf
    • http://venturasoundhouseproductions.com/uploads/1/3/1/3/131384368/34a2e884cb40.pdf
    • http://learn-salesforce.com/uploads/1/3/0/5/130589412/301db30ebbf3e0.pdf
    • http://theironshaker.com/uploads/1/3/0/6/130639934/welabolifaxiraf-mavavoxuvidu.pdf
    • http://northweststuccostone.com/uploads/1/3/0/5/130543155/tifapuzebizuga.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_off0000904e.bin
f72ca4106724f8afb94208254e4e0ee5db6cc7d22e29dbc7c79acbacd83cfc64
pdf-font-stream PDF embedded font (sfnt) at offset 0x904E 8432 bytes