Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ef7250d56e5dc0…

MALICIOUS

PDF

35.3 KB Created: 2020-04-20 02:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ee47568c60114f6700af3a00f144370f SHA-1: 74d798547030f53fa176018e9dfdd13dfadc6a8d SHA-256: 80ef7250d56e5dc0071eba1daeebd817afe0fc63c4b2056805c7bd6c55d32071
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics and the IOC list. This suggests the primary purpose is to direct users to a network of linked websites, potentially for SEO manipulation or to serve further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://kasparianappraisal.com/uploads/1/3/0/7/130739251/130739251.html#olx+pakistan+apk+latest
    • http://atlasaerialimages.com/uploads/1/3/0/9/130969657/tepofoxuwodine.pdf
    • http://rpnsottawa.com/uploads/1/3/0/5/130550847/723444b42.pdf
    • http://mikaelaharris.com/uploads/1/3/1/3/131379168/riruxozaligolig.pdf
    • http://roseandcardamomdesserts.com/uploads/1/3/0/9/130969270/527342.pdf
    • http://escapesz.com/uploads/1/3/0/5/130539442/wawogudosunanew.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_off000060bf.bin
3def275041cbee169b62eb165a3aa2dc948230fd30f5e084b21e34e5b6af492d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 8700 bytes

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