Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabd9e0cdc340d28…

MALICIOUS

PDF

45.6 KB Created: 2020-11-04 10:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ff1ee79c67b78b8ef527127e31e22aac SHA-1: 9f3a3496a64065d54b81db0c458dde7deee77430 SHA-256: fabd9e0cdc340d287c2c998b5e88d7d8c5c4b6ab4dfc5f9f08fcf5c72ae710d4
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to a known malicious domain, suggesting it is used for SEO spam or phishing. The document body, though partially corrupted, includes a URL that mirrors the malicious redirector's target. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points to an attempt to drive traffic to potentially harmful sites.

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://ggtraff.ru/aws?keyword=legacy+of+the+dragonborn+install+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f879add38ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5f8f32fd3a578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382965/normal_5f9431200e21d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5f9dca2fc1a79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f91557640bba.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/fikumodamo_jigomope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f970f643c867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f9f2ec13bda3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b104ec-5c3c-48c9-a3fa-b37b3f1efe6a/need_for_speed_no_limits_hacked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/79012988578.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_off0000739d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 5464 bytes
SHA-256: c8cd415876eb50db34706100f0c47bd89dd0f2de59a81fc94156b245d6cf1cbf
font_01_sfnt_off0000863b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863B 10500 bytes
SHA-256: 085f69e6d2fb3fb37e16e24b7af2e49d5be6c6568558bd00c7543e06ef9b448d