Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dee3a25b1abe5b…

MALICIOUS

PDF

43.5 KB Created: 2020-11-04 05:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b1f30ed876e700c66f47f33058b0c284 SHA-1: c04ff3103b3d272c8f01dad2196c415c60943ce0 SHA-256: a6dee3a25b1abe5b64fcdfa3631645d883e81c4803f63fa8432d97085bbaf675
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a malicious website or download. The ML classifier strongly flagged this PDF as malicious, and the embedded URL heuristic confirms the presence of a link to malicious infrastructure. The document body contains text related to a game, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/aws?keyword=fnaf+sister+location+game+free+online+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8753f15d6b0.pdfIn PDF document text
    • https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/fovesaxunubev-dajizil-vifajemogoduluz-tiluzevemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f99673cdc300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f9cfdd261541.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/d036d17d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f91011b7b6a6.pdfIn PDF document text
    • https://juwememuju.weebly.com/uploads/1/3/4/5/134523402/ba23ee1c4382de.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/dusutogebu_pajijiludeluwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8d248072a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5f907b2e49cf5.pdfIn PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/a944d06f0b7ec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5f995f1d7e5d1.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/mijedusovineti/21834238210.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_off00006cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDA 5156 bytes
SHA-256: e8343975b9e66edc4a5ea1ce7ecbd929b8bb75f6401e5224582d706f620538cf
font_01_sfnt_off00007e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E57 10092 bytes
SHA-256: 8bb17a5e62e9fcd05e6b768f645c19d0bfc123e8e3781d52af3a75ef9463d8af