Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95a8f0d88604ec6…

MALICIOUS

PDF

42.0 KB Created: 2020-04-08 05:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eb31b60e42ebd44ae02984905913d475 SHA-1: c4c460305c8b5a34e51d068862850cf198de6e17 SHA-256: f95a8f0d88604ec633cdebd9ace5ff9cc5aa389b1202521f26e4c80a251b20ef
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 strongly indicated maliciousness. The embedded URLs suggest a link farm or SEO poisoning tactic, likely intended to direct users to malicious content or phishing pages.

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://mysaphi.com/uploads/1/3/1/4/131437313/131437313.html#norma+astm+e112+para+tama%C3%B1o+de+grano
    • http://reidvisualco.com/uploads/1/3/0/7/130775260/88a7a3.pdf
    • http://filippobuccarelli.eu/uploads/1/3/0/8/130874384/5b9a56f5b.pdf
    • http://buyherepayherezerodown.com/uploads/1/3/0/8/130813381/xuvexiwebolijijo.pdf
    • http://astitchoffaith.com/uploads/1/3/0/6/130620637/vesenetu_dodib_poxutilev.pdf
    • http://vatspeak.com/uploads/1/3/0/2/130289177/322afa80a.pdf
    • http://jkphotographyvideo.com/uploads/1/3/0/7/130776201/4750161.pdf
    • http://internmission.com/uploads/1/3/0/4/130483728/nenilapibup.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff4.bin
5fb9d1caf4b93901e2b1b961ae75910ba88ff0ef6bb66de4219621048c56aff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF4 8600 bytes
font_01_sfnt_off00008efb.bin
74a6476bc50c415754eef6ec38e0edcbfbb2dcc724705042afdb8d52e82c36fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFB 2824 bytes

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