Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ecb06d19486750…

MALICIOUS

PDF

39.0 KB Created: 2020-05-15 01:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fa47b3b3df537468e024cc7c24ed45a SHA-1: 964738c2a0e067caa2de1e3f7e3e9fbff07cc97a SHA-256: 76ecb06d194867509b29dd4ded1363b4b29a008f2004fc1ae04b2df6e2688d37
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially malicious content or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://kinglobby.net/uploads/1/3/0/7/130740191/130740191.html#arma+2+dayz+chernarus+map
    • http://313designs.com/uploads/1/3/0/5/130544379/5929979.pdf
    • http://enjoyhomestay.com/uploads/1/3/0/8/130874470/puborijetolulatudisu.pdf
    • http://thewef.org/uploads/1/3/0/7/130775701/9690450.pdf
    • http://caringangelsinc.org/uploads/1/3/0/5/130550901/sukunuwikof.pdf
    • http://sunray-services.com/uploads/1/3/0/9/130969690/vamutifekoz.pdf
    • http://meetcoe.com/uploads/1/3/0/7/130776328/c8e8aef4e71a37.pdf
    • http://npsvs.com/uploads/1/3/0/5/130544468/6e9f168844.pdf
    • http://rideandtrain.com/uploads/1/3/1/1/131163834/4474240.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_off00006d17.bin
31dd16c9d15142b61abca45d3df341a0566d97f7fe5b0b7758b1cbbd647d0d27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 10660 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.