Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de665dfb2809e0f…

MALICIOUS

PDF

39.2 KB Created: 2020-05-13 12:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ce1ac5e6a3079401a691e1c44fc9a9ce SHA-1: e17897c8d9628d9191c672b048981f1ac80a2e93 SHA-256: 7de665dfb2809e0f4648d7fc584ba71fb9a8613e4bcb1181f9c17f8e8b14902f
94 Risk Score

Malware Insights

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

The PDF document is identified as malicious by an ML classifier and contains a large number of external links, a technique often used for SEO poisoning or to distribute further malicious content. The document body, though obfuscated, contains text related to a 'Chevrolet trailblazer 2015 owners manual', suggesting a lure to disguise the malicious intent of linking to numerous other PDF files hosted on various domains.

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://eldoradohillsarts.org/uploads/1/3/1/3/131379253/131379253.html#chevrolet+trailblazer+2015+owners+manual
    • http://nursebettygotbeats.com/uploads/1/3/0/8/130814032/f24d1b.pdf
    • http://bczobarstnieciba.lv/uploads/1/3/0/5/130590677/7d14e56f2160bd.pdf
    • http://kmzadjali.com/uploads/1/3/0/5/130588225/2922122.pdf
    • http://curbsentinel.com/uploads/1/3/0/9/130969085/2837579.pdf
    • http://tlnash.com/uploads/1/3/0/9/130969762/nogixuxolewifazix.pdf
    • http://paulscottcurtis.com/uploads/1/3/1/4/131453221/1487387.pdf
    • http://tamaraparnaycom.com/uploads/1/3/1/4/131411600/8526181.pdf
    • http://bridgethelena.com/uploads/1/3/0/7/130740199/tanizotuzepev.pdf
    • http://cpanel.ki4life.com/uploads/1/3/0/5/130543285/pisewudubuvojo.pdf
    • http://swisspassions.org/uploads/1/3/0/7/130775879/fefib_dipuxevov.pdf
    • http://glennsellsfloridahomes.com/uploads/1/3/0/8/130813998/3e4d2a4ed7efbb3.pdf
    • http://tjentcorp.com/uploads/1/3/0/8/130814731/6092974.pdf
    • http://letslulu.com/uploads/1/3/1/4/131406680/8203499.pdf
    • http://janbidwellconsulting.com/uploads/1/3/1/3/131397981/tiwitegojagosogiz.pdf
    • http://frugalfixer.com/uploads/1/3/0/7/130776672/wazomotisolup.pdf
    • http://btcparish.com/uploads/1/3/0/4/130475932/4752812.pdf
    • http://havencounsellingedinburgh.com/uploads/1/3/1/4/131438329/lewizijuletinuxojov.pdf
    • http://fenlandtransportservices.com/uploads/1/3/0/5/130543598/mavumewodafuda_rifebaz_gusafigipew.pdf
    • http://ginger-yoga.com/uploads/1/3/0/8/130873917/907d21d5e1a.pdf
    • http://rixibaby.com/uploads/1/3/1/1/131163601/2952951.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_off00006d66.bin
7191984b5f037629a59f471de5d6667b75f07040fa6bab5ef043a60b1fd6bbbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D66 10320 bytes

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