Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a5b931095c4c35…

MALICIOUS

PDF

52.7 KB Created: 2020-11-04 05:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5d061dc9e0d08314e1643a3e90aca4aa SHA-1: 3817079d950ab5117ab0628e7ea5e6b81fccb2ee SHA-256: f2a5b931095c4c359bb404ccfedf24248cc15a2f9d7826529fc98f18d29d184a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded URLs, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or phishing attempt, aiming to direct users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://gettraff.ru/123?keyword=severn+bridge+wales+uk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5f9c00c84eea3.pdfIn PDF document text
    • https://jokatilowiwege.weebly.com/uploads/1/3/4/3/134369617/4769664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402717/normal_5f9f0c1e63fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5f994b8e7812d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f90b797a8ec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5f972ca61befb.pdfIn PDF document text
    • https://razesupimo.weebly.com/uploads/1/3/2/8/132815812/kaxobaferusatejez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f89a66050d8d.pdfIn PDF document text
    • https://jusemeki.weebly.com/uploads/1/3/4/5/134506960/suxab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f969996b7dce.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/mowigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/most_dangerous_freshwater_fish_in_usa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8F 5452 bytes
SHA-256: 7a85ab70bf5f600ec45a61df980f5f055bca91759b657b376d21307994c9e15d
font_01_sfnt_off0000a23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA23A 10576 bytes
SHA-256: e12b326025dc007227ae5f57fdb1f83bea1ff943e93550dd1ce623417341afb3

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