Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dee07c8a456a962…

MALICIOUS

PDF

89.0 KB Created: 2021-04-06 10:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f02ca5ebd3d8abb5fa8382f978f98977 SHA-1: d6bcd0515bb8156226be419d3099d4506a8d2db9 SHA-256: 0dee07c8a456a9628fc68cbe7b63aac0bc188d317f8d3af579ccd0e37456c10e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=ableton+live+intro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371788/normal_600ebc9ceb007.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/EKgj5Rr/utsa_blackboard_grades.pdfIn PDF document text
    • https://cdn.sqhk.co/zewulutaj/igCgiGX/bts_dynamite_mv_live_view_counter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fed268df3614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467007/normal_601f155b785d8.pdfIn PDF document text
    • https://cdn.sqhk.co/gedadixugud/7eNi5Eu/nilixesisirov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417321/normal_603bf97d5e4ea.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/Wjjihig/79038134514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_60198aa47e2b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_600ebd4919f4b.pdfIn PDF document text
    • http://zakozoxutujo.22web.org/sekivisokalikibo.pdfIn PDF document text
    • http://fisogik.iblogger.org/metric_mania_conversion_challenge_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_606646652c455.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/cb8aa681-279a-49a2-b87c-74500224aa16/solving_systems_of_quadratic_inequalities_by_graphing_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b731629-28ab-4f3e-89e9-d07bc98979e4/jidewopeno.pdfIn PDF document text
    • http://tukemujixoku.rf.gd/nuweposafej.pdfIn PDF document text
    • http://butadiviwev.rf.gd/lulus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1ed57c-1f87-4b6e-826c-c7d3e7068dcc/clculo_de_reas_e_integrales_dobles_ejercicios_resueltos.pdfIn PDF document text
    • http://gabatotudam.rf.gd/13217119652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b740c6-7166-480f-b2b6-848026860204/jagutevuvixufuvowazap.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_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 4480 bytes
SHA-256: 9a61709a52c098675d6fe2f979356fbb5f9f713e32fa539b86e9b9a6c5fa0ba3
font_01_sfnt_off000130c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C7 11408 bytes
SHA-256: 1ada39316b48281fff8a6b903688ef499373691f97577bdb865d0ecd0d5bd882

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