Malicious PDF — malware analysis report

Static analysis result for SHA-256 17292914a218d708…

MALICIOUS

PDF

32.8 KB Created: 2020-05-27 10:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a905e2720843792d016522e60832815e SHA-1: b55aadad31576e683c20019638335a2b81a2463e SHA-256: 17292914a218d7085c841c5308fc24bb2117c85113d2d8594ed33d010070bf07
96 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs that lead to external websites, many of which are hosted on suspicious domains and appear to be part of a link farm. The document body, though heavily obfuscated, contains references to a 'Minecraft cathedral schematic' and the wkhtmltopdf application, suggesting a lure to entice users to click on the malicious links. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of it being used to distribute further malware or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://74-123-75-216.mgwnet.com/uploads/1/3/0/6/130604882/130604882.html#minecraft+cathedral+schematic
    • http://okpromotional.com/uploads/1/3/1/3/131381806/7c1206f09efe7.pdf
    • http://southernaustraliaservices.net/uploads/1/3/0/2/130287923/8798372.pdf
    • http://everywomandoulas.com/uploads/1/3/0/3/130313500/1178165.pdf
    • http://webdisk.drbiophysics.com/uploads/1/3/0/5/130540824/64fa12a96.pdf
    • http://semaindustries.com/uploads/1/3/0/6/130621294/xawemanepezifoxix.pdf
    • http://un-guilty.com/uploads/1/3/0/2/130288661/vajujaseroj-munuzi-botexolizuwazop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005574.bin
27376a76d87b2bff6c2223eea13d0a4ad3a66cc5e30ceb8f341574361f45051c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5574 10372 bytes

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