Malicious PDF — malware analysis report

Static analysis result for SHA-256 715e82b65f1aea2f…

MALICIOUS

PDF

33.4 KB Created: 2020-04-09 20:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dedceeb3dcb0a7dad880a982dcd32a14 SHA-1: 0b74566f9245e66e89a176f4130e752c951da568 SHA-256: 715e82b65f1aea2ffb0a21d8eae63c405fdd614ae61438717043d6d3ef5d18f4
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to distribute malicious content or engage in SEO abuse. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains text that appears to be a lure for educational materials, likely to entice users to click the embedded links.

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://iamktmusic.com/uploads/1/3/1/6/131606330/131606330.html#abc+biology+book+class+11+pdf
    • http://1intentionalsurroundings.com/uploads/1/3/0/9/130969130/vagizubafube.pdf
    • http://mainecitizenelections.com/uploads/1/3/0/4/130483993/mazedebedagan-dajudunesozosag-tufilefuboku-mafodinip.pdf
    • http://htownrentals.org/uploads/1/3/0/5/130539300/gunafifisalavo.pdf
    • http://skelcocc.com/uploads/1/3/0/6/130620670/1269388.pdf
    • http://deluxehairs.com/uploads/1/3/0/7/130738681/tifuvim.pdf
    • http://cmnseri.com/uploads/1/3/0/2/130287302/74a823.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_off00005a07.bin
f67cc9d8365ae592790c13e284732ad8508043655cefa8080730e438222fa2a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A07 8220 bytes

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