Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad41472cc18d3af…

MALICIOUS

PDF

28.7 KB Created: 2020-03-14 20:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f9792eab118209fa3a3124f2d697c103 SHA-1: 651d3649f736d9aa730ee93cb9585c3591ab0a7f SHA-256: 2ad41472cc18d3aff8db2aedabe0163a8d8c843b11aa5f1edb8295d924e16bdb
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness. The primary attack pattern involves luring users to these external URLs, which could host further malicious content or phishing pages.

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://www.leatherworksplustexas.com/uploads/1/3/0/5/130550846/130550846.html#h+letter+whatsapp+status+video+song
    • http://jesse-robinson.com/uploads/1/3/0/4/130490461/20fb5588.pdf
    • http://premieraccountadvisor.com/uploads/1/3/0/7/130739492/2618971.pdf
    • http://umbau.us/uploads/1/3/0/6/130621721/kivixujorobu.pdf
    • http://pointpendants.co.uk/uploads/1/3/0/3/130324005/7342124.pdf
    • http://www.seridianconstruction.davidmichaeldesigns.com/uploads/1/3/0/4/130483200/5231770.pdf
    • http://fostersplacedover.com/uploads/1/3/0/5/130588207/gixote.pdf
    • http://www.shopinhercloset.com/uploads/1/3/0/5/130590047/5532529.pdf
    • http://mail.bluefirepits.com/uploads/1/3/0/6/130620451/8a067e.pdf
    • http://blackandchosen.com/uploads/1/3/0/4/130478160/bapirozexafejinibak.pdf
    • http://www.thehappyhaircompany.com/uploads/1/3/0/6/130621334/5786228.pdf
    • http://theletgoband.com/uploads/1/3/0/3/130313471/74431.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_off00004c24.bin
7f028c88aed5aa08bc3deed70ddfed510f22184994a3368e0f5ff848a2872e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C24 5916 bytes

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