Malicious PDF — malware analysis report

Static analysis result for SHA-256 669ff3477d6168a8…

MALICIOUS

PDF

42.9 KB Created: 2020-03-10 14:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf108429ae35e650f8dee2899f8562c9 SHA-1: 4cfafdbbd8cb85c9b0aeb0dbb5355b0980b4dbc3 SHA-256: 669ff3477d6168a84c7c62230ed5011d6256bba03b9272977112a39f102be4c8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a 'PDF link farm' heuristic. These links point to various domains, many of which appear to be auto-generated or SEO-focused. The primary purpose seems to be directing users to a network of websites, potentially for malicious redirection or to host further malicious content. No scripts were extracted, but the structure strongly suggests a phishing or traffic-driving campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://createcapitaladvisors.com/uploads/1/3/0/3/130379638/130379638.html#placenta+previa+marginal+definicion
    • http://www.danubius.dadgifts.us/uploads/1/3/0/6/130604476/dofavulaxujikurit.pdf
    • http://www.capitalmetal.com/uploads/1/3/0/2/130272937/sukizolaf-wawegototarutew-wogekekoro.pdf
    • http://christiesmworld.com/uploads/1/3/0/7/130740177/2373871.pdf
    • http://improveed.org/uploads/1/3/0/7/130775275/sizedi.pdf
    • http://allielynch.com/uploads/1/3/0/6/130605498/fapixuwovu-kewazutumu-suxobunofa-memagafibera.pdf
    • http://soulreviver.com/uploads/1/3/0/6/130622068/4815436.pdf
    • http://www.northridgevillesubway.com/uploads/1/3/0/7/130775660/f57ad4.pdf
    • http://flexjm.com/uploads/1/3/0/6/130639785/boxeze_bunuxedijunak_gokipu.pdf
    • http://baelts.com/uploads/1/3/0/6/130621868/lowanum.pdf
    • http://justspitit.com/uploads/1/3/0/3/130379123/1519650.pdf
    • http://listeningplacespiritualcenter.org/uploads/1/3/0/4/130436451/virizivigaw.pdf
    • http://dunaecrenwelge.com/uploads/1/3/0/4/130435927/rafavinej.pdf
    • http://ellenmhuffman.com/uploads/1/3/0/4/130483710/da0c40e7.pdf
    • http://internetsmoney.net/uploads/1/3/0/2/130270904/nuwobumetekakiz-nubinizu.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_off00007c5a.bin
b75456aae2f5ba7392e96c411ceb44b95cc006e2a868ec68b6a54677fd215ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5A 9100 bytes

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