Malicious PDF — malware analysis report

Static analysis result for SHA-256 801d8ec6a1f5382e…

MALICIOUS

PDF

28.6 KB Created: 2020-06-03 09:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2087c06f40c97c264c355d642ab870e SHA-1: 57bf1a64ad1bfca0f0b1597f28768efc1cbfdd11 SHA-256: 801d8ec6a1f5382eab5244f279154661765bb0c32f3045168496ca7321a74cbb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF file contains a large number of external links, many pointing to other PDF files on different domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded content suggests a lure related to 'Bebe jugando dibujo' and includes multiple URLs that appear to be part of a link farm or distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dentfreetoday.com/uploads/1/3/0/6/130620849/130620849.html#bebe+jugando+dibujo
    • http://agsheating.co.uk/uploads/1/3/1/8/131871980/nirefogabis.pdf
    • http://pppsanitation.com/uploads/1/3/0/3/130313194/3807101.pdf
    • http://1md.undesirable.us/uploads/1/3/0/3/130323237/beduseromuwiku_ribapuguwojo_rumizero.pdf
    • http://triangleadvisorsgroup.org/uploads/1/3/1/3/131379554/kurodugoz-texosutafava-mojuvure-linesap.pdf
    • http://mail.harrisbuilds.com/uploads/1/3/2/3/132303071/fiwemepijesa.pdf
    • http://marellasmomentsmatter.com/uploads/1/3/1/0/131070710/08f9921a5c4.pdf
    • http://dentfreetoday.com/uploads/1/3/0/6/130620849/terms.html
    • http://dentfreetoday.com/uploads/1/3/0/6/130620849/dmca.html
    • http://dentfreetoday.com/uploads/1/3/0/6/130620849/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://pegolupoduw.files.wordpress.com/2020/05/49206254454.pdf
    • https://pipimoti.files.wordpress.com/2020/05/nedavewuwumebasilikawotub.pdf
    • https://belojukoxoja.files.wordpress.com/2020/05/kodigonubixi.pdf
    • https://josejoxoboko.files.wordpress.com/2020/05/26465060150.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045fe.bin
6f6c9e9638cb40d93c8142dfe4de83a34da8147f17199fae6bbe2d22eaabc410		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45FE 9680 bytes

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