Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f20922eda3d4559…

MALICIOUS

PDF

44.9 KB Created: 2020-06-09 02:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7600331d9bae8034d25837e45ea916 SHA-1: 7351c8e2beb49092210489fb42362c71afb170f9 SHA-256: 3f20922eda3d45594c94d43a57ffc5af3e2a73eb052f4b6e6176890fd410036d
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to host malicious content. The ML classifier strongly flagged this PDF as malicious. The document body contains text related to downloading a game, which may serve as a lure. The primary malicious indicators are the numerous external URLs pointing to potentially compromised or malicious 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://cpanel.themodestshoptx.com/uploads/1/3/1/4/131452821/131452821.html#gta+4+nas%25C4%25B1l+indirilir+sa%25C4%259Flam+indir
    • http://florsnmore.com/uploads/1/3/1/3/131380031/1031180.pdf
    • http://thecloverboutique.com/uploads/1/3/0/5/130550729/7652335.pdf
    • http://thecopmafia.com/uploads/1/3/0/4/130483279/xutok_tulujokewudirex_sikeguxo.pdf
    • http://conflictresolutionnw.com/uploads/1/3/1/4/131453355/002ed.pdf
    • http://williamlauto.com/uploads/1/3/0/5/130589133/8956409.pdf
    • https://govizugag.files.wordpress.com/2020/06/97337299579.pdf
    • https://fulafemep.files.wordpress.com/2020/06/20320212077.pdf
    • https://zifenopi.files.wordpress.com/2020/06/budimilugomusujid.pdf
    • https://bavewulowelo.files.wordpress.com/2020/06/70243160268.pdf
    • https://ketowal.files.wordpress.com/2020/06/57182608604.pdf
    • https://pitekule.files.wordpress.com/2020/06/86666168692.pdf
    • https://fububoxoludi.files.wordpress.com/2020/06/bagutedag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ba0.bin
56f9fb540e7e5657ca6fab4e7ef541bdf9a30eefbef2b54e1ac577addb6899d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA0 1704 bytes
font_01_sfnt_off0000641f.bin
ae9820d039037210207deb90d2463aca561ce3a7333d64d26943ec364e61fb8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 14652 bytes
font_02_sfnt_off0000909b.bin
37856296c0d585a356df849b4b75a3311a6681817f0054dc1962a7d25ba5224f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x909B 16060 bytes

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