Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc24df048ee83cca…

MALICIOUS

PDF

41.5 KB Created: 2020-03-23 12:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cd4e4b3093fbf1335fa3cbbd69450903 SHA-1: b8f9b1727c105ec071a397d3562713fc3191bee3 SHA-256: dc24df048ee83ccaf2c7aa95915bd54cd211ebcb4cbeca8b318a2cf30c2609fc
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially obfuscated, includes text related to workouts and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to a network of linked pages, likely for further exploitation or phishing. No scripts were extracted from this sample.

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://bluelinesalesllc.com/uploads/1/3/0/5/130589345/130589345.html#best+bodyweight+workout+for+beginners
    • http://www.myftech.com/uploads/1/3/0/2/130289385/23f8f44b2578bb.pdf
    • http://killforeden.com/uploads/1/3/0/6/130604349/6107026.pdf
    • http://www.zoom-formation.fr/uploads/1/3/0/6/130620542/sojivurorin-dururod-bikemofexis-nomevulan.pdf
    • http://audioriotmusic.com/uploads/1/3/0/3/130379777/3241687.pdf
    • http://quanxunxianshangyule.br3h.com/uploads/1/3/1/0/131070080/digag.pdf
    • http://journeyfilm.net/uploads/1/3/0/8/130814984/pejowetovufewotixug.pdf
    • http://dalcomme.com/uploads/1/3/0/4/130488773/reduto_kabumobi_zowal_wozupakuv.pdf
    • http://courtneyaubertinephotography.com/uploads/1/3/0/6/130604372/jemudolijuropo_zefewe.pdf
    • http://thetenderpath.net/uploads/1/3/0/8/130814868/lagoxosozuzolekilop.pdf
    • http://jamescancer.info/uploads/1/3/0/6/130621874/2236990.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_off00007692.bin
141ec64db439ac8daf16f65f9e2a77599ccc6778c31ec9ef25385d1f11a55baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7692 8612 bytes

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