Malicious PDF — malware analysis report

Static analysis result for SHA-256 707291ca13162267…

MALICIOUS

PDF

29.3 KB Created: 2020-04-11 03:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6a9cc6ea6317ee844c2223dbd3974515 SHA-1: d50332a6916ea09d85f12bf47e4f4ff306dc1b35 SHA-256: 707291ca1316226719bc617a60ea9ef016b8204691a4240f380a46ced1bfb189
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 link farm, pointing to various websites. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-like URLs suggests a campaign to drive traffic to potentially malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection scheme.

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://www.xmo1.com/uploads/1/3/0/2/130271143/130271143.html#2007+toyota+avalon+driver+side+mirror
    • http://nerdzllc.com/uploads/1/3/0/6/130604588/7313c2c22657f.pdf
    • http://greendreamteamokanagan.com/uploads/1/3/1/1/131164531/wekavovoru.pdf
    • http://clockrepairatlanta.com/uploads/1/3/0/6/130604497/2308472.pdf
    • http://lavaquitafeliz.net/uploads/1/3/1/3/131379832/xepowomipenam.pdf
    • http://iankwalker.com/uploads/1/3/0/7/130775056/zazuxizudovetov.pdf
    • http://ultimatefantasyfighting.net/uploads/1/3/1/4/131410399/769129.pdf
    • http://ghoti.shop/uploads/1/3/0/5/130544672/sivejogula.pdf
    • http://ee.education/uploads/1/3/0/4/130491703/196ae20afe8ea.pdf
    • http://mhcchurch.org/uploads/1/3/0/6/130639869/neviloz.pdf
    • http://coldbrewespresso.com/uploads/1/3/0/4/130483499/1867622.pdf
    • http://rekazconsult.com/uploads/1/3/0/6/130621218/9168089.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_off00004b50.bin
51761d4ddb7a1dc1f0aa51ff15726c42acb8d9dd4c3010bb7785974763853933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B50 7668 bytes

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