Malicious PDF — malware analysis report

Static analysis result for SHA-256 070ad1dc92cf1f4f…

MALICIOUS

PDF

140.4 KB Created: 2020-04-11 08:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 60d61dcf83dfd1eb71acac5a574db10e SHA-1: dd1cf312461fa32e0f88e60bf116a503aa493fdc SHA-256: 070ad1dc92cf1f4f91e1f37b3d041515a87fdcb7685a774f2a95ba71118e7dd4
96 Risk Score

Malware Insights

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

The PDF file contains numerous links to external PDF files hosted on various domains, suggesting a link farm or a method to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards a phishing or content-luring attack pattern. Although no scripts were explicitly extracted, the structure and numerous external links are indicative of malicious intent, likely to lead the user to a compromised site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trentriverdesigns.com/uploads/1/3/0/2/130291373/130291373.html#trumpf+laser+manual
    • http://roaminghart.com/uploads/1/3/0/6/130604789/8619001.pdf
    • http://bodywisdommethod.org/uploads/1/3/1/4/131453049/8af7b4ac02f.pdf
    • http://showerrific.com/uploads/1/3/0/2/130287456/wurebofanu.pdf
    • http://harrisdalehandymanservice.com/uploads/1/3/0/5/130539427/ae217380a24.pdf
    • http://jackelynmartinezmscjcla.com/uploads/1/3/0/8/130874338/9455305.pdf
    • http://rkgenergy.com/uploads/1/3/0/3/130379151/fijitiduzo.pdf
    • http://passionatepursuit.net/uploads/1/3/1/4/131454262/bamafimifake.pdf
    • http://mercytrading.net/uploads/1/3/0/7/130776126/2419852.pdf
    • http://thefoodbusinessgroup.com/uploads/1/3/1/4/131437641/9945906.pdf
    • http://sequoyahhomesolutions.com/uploads/1/3/1/3/131380390/perab.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_off000208ad.bin
1a8bf51a7a530796c0848a2a8bc0e3cef5c673675f820b593ce7c672c9e0566d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x208AD 7164 bytes

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