Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac21d6b3596bf196…

MALICIOUS

PDF

70.4 KB Created: 2021-03-02 23:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7ef7ff0cde3c54901c758441a58a8856 SHA-1: ca13e1507ccec818f5553485c56adb65c23be281 SHA-256: ac21d6b3596bf19699185d7770e51f3be2bb499fc88f74d57f013b2fcb98b9d1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://fokemale.ru/wix?keyword=american+woodshop+plans PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407100/normal_6015c8b4e6ae0.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/DSgcGgh/resident_evil_3_safe_code_carlos_hospital.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_60381e86c42d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fe76de78cf5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_5fe95f8eaaef6.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/love_quotes_from_les_miserables_musical.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/17874424419.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458839/normal_5fe06d9cce316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_60285689bc0d9.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/can_you_put_two_hotels_in_monopoly.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493597/normal_6003d32fea024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_602ea9c46cd97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://firuwasuwubo.epizy.com/32453048384.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_off0000d73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73B 5396 bytes
SHA-256: 51e0e84f5ea964e8e889560985ccafe68490a9a2bb9e72eecfd41aa9740b07b1
font_01_sfnt_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 10572 bytes
SHA-256: 8c73e49e25b6e8fc5f2b591e402281f32deef2a9442d3ef92868a90ccae1d184