Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c98df731e8f7d1…

MALICIOUS

PDF

34.9 KB Created: 2020-04-04 10:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ebd502876693b4c3c3b72e15fb9020f5 SHA-1: 9e0c8ef9755c66961db053213c4e971cf5dbb54f SHA-256: 26c98df731e8f7d1cd1ea97cb12e8cbf47e82eb40100aac606c341caf476e458
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs suggest a link farm or SEO manipulation tactic, potentially leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://auto-bargain.com/uploads/1/3/0/2/130272945/130272945.html#monici%C3%B3n+de+entrada+para+misa+de+difunto
    • http://daveschnitter.com/uploads/1/3/0/6/130621545/letunidi-rexetolefavoga-pakikalutego.pdf
    • http://mklophotography.com/uploads/1/3/0/8/130874192/da4c6d8.pdf
    • http://migratinglife.com/uploads/1/3/1/4/131438709/713d99d98cbbbd4.pdf
    • http://rsbdevelopment.com/uploads/1/3/1/3/131379340/d61881df95.pdf
    • http://patlani4.com/uploads/1/3/0/7/130739711/rereretuna_fevibebotaxug_ronepajuf_nuxuj.pdf
    • http://cincydraft.com/uploads/1/3/0/2/130272234/puzobajowufawugef.pdf
    • http://shadowrunlabs.com/uploads/1/3/0/6/130604397/wokawuw.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_off00005ebc.bin
a78c7c42e3065dd5f58ab7aa5b793ae650e703a6fd896b74edeadee6ebf51bc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBC 8196 bytes

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