Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab01bf452e70eb5f…

MALICIOUS

PDF

74.1 KB Created: 2021-03-04 19:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8a066c0dc3a27292f8fd9f3283f7f859 SHA-1: c9dcad7d8dfd5b485f68c70c561ef8b4e4af94f6 SHA-256: ab01bf452e70eb5fffde9b7a5058eb40a5c58d2c66cf38029b4e11a0111802c6
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is part of a network designed to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=free+riot+codes+valorant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393779/normal_6013ab08565d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474979/normal_6030d94ead70e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501656/normal_5fe2bbd09f858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_602593bbd269d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5fe532069f67f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_6021243bde677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385030/normal_6024fbb1dfda0.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/the_decision_book_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fd1cde42034d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_5fcbdcab8609e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388165/normal_5fca959d78f73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393772/normal_5ff8f33a66781.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/pabumonugonoremesipet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5fd7143e438fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_b2bc7005a1a442fba227afa732d7760c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/3_bachelors_movie_khatrimaza.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_da1e17a0b8a34ca0bc203a8298e24e23.pdf?index=trueIn PDF document text
    • http://pekomuvave.myartsonline.com/french_irregular_verbs_conjugation_avoir_passe_compose.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_0a5d82c3dc8a40f3b38febc5bc4fc0fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuxime/galeruripeteforiwirex.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/horror_background_images_for_editing.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_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 4948 bytes
SHA-256: 5d0b13e7b93c6f020cf10edd10a16a84a2bad64212901f02e8bb9bfed1436887
font_01_sfnt_off0000f734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF734 10472 bytes
SHA-256: 9603477b684ddb799295babc4e6001aecf2c89edb880c24a7e278e6fa3aa3edd

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