Malicious PDF — malware analysis report

Static analysis result for SHA-256 7404330289cfa023…

MALICIOUS

PDF

33.6 KB Created: 2020-05-24 01:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a37ddd36eef7f01f6399c047de4dff76 SHA-1: caa77261363482074a79aa7185b201170ac05c3a SHA-256: 7404330289cfa023eed0a3019824c2f33d8d5f3dace51b3889db1525ce229cf4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links likely serve to manipulate search engine results or redirect users to malicious websites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests a distribution or SEO poisoning campaign.

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://ogemahouse.net/uploads/1/3/1/4/131437671/131437671.html#teoria+general+del+estado+hans+kelsen+pdf
    • http://stevie-borne.com/uploads/1/3/0/2/130291996/beluxomefit.pdf
    • http://reversereach.org/uploads/1/3/0/6/130621829/mitolomobid.pdf
    • http://britain-together.com/uploads/1/3/0/4/130483417/rawek.pdf
    • http://ulhe.org/uploads/1/3/0/7/130775053/mozomesuvijizeg-kenebepe-sabel-jerubimutetetu.pdf
    • http://mrslowesclass.com/uploads/1/3/0/4/130476340/zabifobofud.pdf
    • http://golddetectives.net/uploads/1/3/0/9/130969129/tupotarafa_xumita_zilivojepegexux_zitemif.pdf
    • http://beerrunrace.com/uploads/1/3/0/6/130622011/paxudelixefumonafove.pdf
    • http://nicholemannion.com/uploads/1/3/0/2/130288511/3290453.pdf
    • http://timpicardmusic.com/uploads/1/3/0/6/130604233/9a7a68e7a44a011.pdf
    • http://trailhead64.com/uploads/1/3/0/3/130313183/3001115.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000574e.bin
f543b5463cecd35cbc7cd158b634a06946c89dd0e4e707d027e3576c8282f93b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574E 11168 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.