Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0177413461ded8…

MALICIOUS

PDF

47.1 KB Created: 2020-04-25 15:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e80b26e34b2c0d4d3baf56e6ba8f9870 SHA-1: e10e9b7cf3f05cbc28d5c05d487185c0dad5e396 SHA-256: 1d0177413461ded8919eb36b2c0e5b10cafdb80fde1b9949e64a66edd801320d
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various websites, many of which appear to be part of a link farm. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to these external sites, likely for SEO manipulation or to host further malicious content.

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://ttmusb.com/uploads/1/3/0/3/130379426/130379426.html#chade+meng+tan+search+inside+yourself+pdf
    • http://soniacartoonart.com/uploads/1/3/1/4/131407918/pejibepojinot-bader.pdf
    • http://fakeyourage.shop/uploads/1/3/0/7/130775199/wifojoropod.pdf
    • http://vendettagear.com/uploads/1/3/0/5/130590325/9207994.pdf
    • http://detourfromtheeveryday.com/uploads/1/3/0/5/130588297/4e9e985e9b963fa.pdf
    • http://pqlpottery.com/uploads/1/3/0/5/130551639/delobixowubofa.pdf
    • http://e-find.hk/uploads/1/3/1/0/131070695/b36bb.pdf
    • http://derekbeckvold.com/uploads/1/3/0/2/130287505/77e56787ee.pdf
    • http://jefkordas.com/uploads/1/3/1/4/131454731/c0deef.pdf
    • http://jacquelines.shop/uploads/1/3/0/3/130379104/8144286.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f7e.bin
e69c1c967b69ed08d0e48b403e303fa8797b1bdc54d7179021dab42309fb10c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7E 8224 bytes
font_01_sfnt_off00009ef3.bin
6fd0bae05d41d2be687eb494b33c21a21b41dda8f32fbd20d971a1ed7e261af3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF3 4816 bytes

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