Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ed037be9216d22…

MALICIOUS

PDF

34.8 KB Created: 2020-04-01 20:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f7ea2542d15ef7055ecfac71f3a52464 SHA-1: f9e61a9ae62ee708ddb385faebead58954103a63 SHA-256: a6ed037be9216d221654e4e13c4a3d3061bc458053d3fd9f3a424638e197791d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains a URL that is also present in the list of extracted URLs. This suggests the primary purpose of the document is to redirect users to these external sites, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://preecelightning.com/uploads/1/3/0/5/130542908/130542908.html#reacci%C3%B3n+de+celebridades+a+killshot
    • http://csldelta.com/uploads/1/3/0/8/130874606/todabolapiran-jopafi-lituwozuzito-netanuzejizoxos.pdf
    • http://calaismack.com/uploads/1/3/0/8/130874600/jexigazuxopis.pdf
    • http://dtghockey.com/uploads/1/3/1/3/131383629/pojikevexofe.pdf
    • http://rudywalkerofficial.com/uploads/1/3/1/3/131398417/nuzixofarozetelama.pdf
    • http://lillelundshandvaerk.com/uploads/1/3/0/7/130776877/neroveped.pdf
    • http://growingdreamspropertysolution.org/uploads/1/3/0/2/130271255/jitedow-tuzagakofib.pdf
    • http://primepolymerpolish.com/uploads/1/3/0/9/130969722/naleg-bufavakigow-tajatuboke-vafer.pdf
    • http://legendarylumber.com/uploads/1/3/0/3/130323253/sureviwu.pdf
    • http://ohioawnings.com/uploads/1/3/0/6/130621523/c5a20ab49d5d4.pdf
    • http://olivekencamera.com/uploads/1/3/0/8/130873992/wodutata.pdf
    • http://betterbeautyandbeyond.com/uploads/1/3/0/7/130775970/690eabaf2.pdf
    • http://kmfcatering.com/uploads/1/3/1/4/131437235/loxifexozagusotater.pdf
    • http://aquaticswithmermaidjenna.com/uploads/1/3/0/6/130620937/kawulupefu-fepaj-vegidemu.pdf
    • http://hi-tonewireless.com/uploads/1/3/1/4/131452743/5040df38e2b.pdf
    • http://fairfieldcountymicroseal.com/uploads/1/3/0/2/130289045/337780.pdf
    • http://topshelf.services/uploads/1/3/1/1/131163653/1908458.pdf
    • http://hollyeandjon.com/uploads/1/3/0/5/130544385/2614384.pdf
    • http://alexpepstein.com/uploads/1/3/0/9/130969051/9863112.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_off00005d40.bin
6b24a2f8c5783bd5b9b0f0cd784b936e9fe171b3635331e4c0e3d9fe87dd7c9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D40 8388 bytes

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