Malicious PDF — malware analysis report

Static analysis result for SHA-256 29942444517b2e2c…

MALICIOUS

PDF

32.7 KB Created: 2020-04-24 17:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 164f80aa9f644ee7b96e8efaa9bfd5f0 SHA-1: feccebadf5f961ce132b4bf152cacc26ed0be8f3 SHA-256: 29942444517b2e2cd17d090232c510150455297dbf267b5ec520b0976dbc7504
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to various domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The presence of numerous PDF_URI and PDF_SEO_LINK_FARM heuristics further supports this assessment. The document body contains garbled text but includes URLs that are also present in the heuristics, suggesting the document's primary purpose is to redirect users to these external resources.

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://hellohilly.com/uploads/1/3/1/4/131437914/131437914.html#allahyar+cartoon+full+movie
    • http://rihgreetings.com/uploads/1/3/0/4/130475994/napix.pdf
    • http://colainteriorpainting.com/uploads/1/3/0/8/130814081/mepin-gidoxuxuto-gobevutuwite.pdf
    • http://sativic.com/uploads/1/3/1/3/131383770/turekakepefimi-kobagetufop-pomikuxubokizep.pdf
    • http://sugarmamasconfections.com/uploads/1/3/1/3/131398357/b5c8c96aaaf5b.pdf
    • http://ckmitryremodeling.com/uploads/1/3/0/7/130739142/vomate-wexegotebet.pdf
    • http://izunajewelry.com/uploads/1/3/1/4/131405927/gozaw.pdf
    • http://guerrillacooking.com/uploads/1/3/1/3/131380836/6041355.pdf
    • http://weststreetcommunications.com/uploads/1/3/1/3/131398498/fasex.pdf
    • http://claraesquerra.com/uploads/1/3/1/4/131453193/e1133e9225.pdf
    • http://guerrillacooking.com/uploads/1/3/1/3/131380
    • 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_off000058fe.bin
d9beb9fd7853d3714b6e0a70d5690d84343efb1a5666bacf36c22aa23be4cd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FE 7640 bytes

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