Malicious PDF — malware analysis report

Static analysis result for SHA-256 9892d522bfe1a771…

MALICIOUS

PDF

38.4 KB Created: 2020-05-26 21:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0be4994ed45cf0d951166908cf92e973 SHA-1: 2281fe7677e40dfbee4a64e7a87daae243707ab1 SHA-256: 9892d522bfe1a771809fb99ae3a5c582001a6fea0cf383428e2479b1b2a7a862
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by an ML classifier as malicious with high confidence. It contains a large number of external links, many of which point to PDF files on various domains, indicating a link farm or redirection scheme. The document body contains garbled text but also includes some of the URLs, suggesting they are intentionally embedded for user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://thebrushmountainlodge.com/uploads/1/3/0/7/130740536/130740536.html#tera+level+guide+65-70
    • http://stefdesign.net/uploads/1/3/0/3/130379147/gakaxadajatige-negomo.pdf
    • http://puppyluproductions.com/uploads/1/3/1/4/131407493/bc1accf434b8a7.pdf
    • http://khiaz.com/uploads/1/3/1/6/131637149/8806733.pdf
    • http://janetevelyncook.com/uploads/1/3/1/4/131407588/16f47f.pdf
    • http://constituentpostcards.com/uploads/1/3/0/5/130550768/0d6ace6af9.pdf
    • http://wvrealestateco.net/uploads/1/3/0/5/130550976/nepem.pdf
    • http://manhped.com/uploads/1/3/1/6/131607930/navuxoxedifu_vupevipixin_konuv.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_off00006ad2.bin
113400018f96c4ec99baf3d2d4b4f75c49686b02e2204e893b6a181fdf4c8381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD2 10632 bytes

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