Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9cc50553369d78…

MALICIOUS

PDF

30.1 KB Created: 2020-04-11 11:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1dbfe08db908e5072ee9b0b7f7ea3e9d SHA-1: 96c37c3c91ce0c0a8d8e99d529dc7091d5dc2772 SHA-256: 9e9cc50553369d7896be98396e8a4cec57ace23e59d23eae928c00778dc34cdc
94 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 domains, indicating a link farm or redirection scheme. The heuristic PDF_SEO_LINK_FARM specifically identifies this pattern, suggesting the document's primary purpose is to drive traffic to these sites. No scripts were extracted, but the sheer volume of outbound links points to a malicious intent, possibly for SEO poisoning or to host further malicious content on the linked 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://coolmanraulh.com/uploads/1/3/0/4/130493816/130493816.html#darkroom+fairfield+victoria
    • http://sinclairbrewing.com/uploads/1/3/0/6/130603904/7016690.pdf
    • http://juliannevaccaro.com/uploads/1/3/0/2/130287502/8535343.pdf
    • http://antojitos.info/uploads/1/3/0/5/130589360/xotozeloto.pdf
    • http://thepixelshelf.com/uploads/1/3/0/6/130603956/8106490.pdf
    • http://popsgolf.com/uploads/1/3/1/4/131483416/8683439.pdf
    • http://sscshoponline.com/uploads/1/3/0/7/130739144/zakuvizuvinusinolebo.pdf
    • http://gastineaurealty.com/uploads/1/3/0/5/130551456/1857851.pdf
    • http://jphotograhics.com/uploads/1/3/0/5/130543310/337abde.pdf
    • http://itservice-koch.de/uploads/1/3/1/4/131438305/0506df75.pdf
    • http://davidalexanderrodriguez.com/uploads/1/3/0/8/130814056/5073931.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_off00004f9e.bin
b100550894c5f5ac374be1ed122b23379a7fff0e7e0ac7d4477444db46e30a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9E 7448 bytes

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