Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f28c1ad919e0c55…

MALICIOUS

PDF

112.0 KB Created: 2021-03-28 19:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: f236db1f45363a3fd7a3cc350ff0b97b SHA-1: 4a75a948b7562065fdac73f51f4eab4522b1ee55 SHA-256: 3f28c1ad919e0c553b88a864218c49ce020625eadf343afea93bf887f7843620
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it's designed for phishing or malware distribution. It contains numerous external URIs, including one pointing to 'botokaw.ru', suggesting a lure to a malicious site. The PDF structure and embedded links indicate an attempt to redirect users to potentially harmful content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=form+1040-v+2020 PDF link annotation
    • https://cdn.sqhk.co/xuxiropuwomo/coTSYic/red_ball_3_unblocked_66.pdfIn PDF document text
    • https://cdn.sqhk.co/pozazoji/hegjhai/8267654580.pdfIn PDF document text
    • http://whalesqpa.fun/what_is_the_message_of_green_eggs_and_hamnrhcx.pdfIn PDF document text
    • http://reznitskygallery.com/penyebaran_agama_kristen_di_indonesiaogk8e.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/gamupiteverutopojuxpr5m.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/804848389823b4dl.pdfIn PDF document text
    • http://autokenn.com/dunkin_coffee_nutrition_informationyfiot.pdfIn PDF document text
    • https://cdn.sqhk.co/fixijolexap/NsYgcge/aptitude_test_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/YihridD/the_factory_kitchen_dtla.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_79a44688e1f3469d948a8f5d9bf860a0.pdf?index=trueIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_4f8dc5e241064105869570999da21e06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rorives/charter_communications_remote_codes.pdfIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_597041cde35d4f98a2293c56e29a7c06.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb7c290-bfbb-451e-887b-a805900bb500/71491163572.pdfIn PDF document text
    • http://tumofif.rf.gd/29222999401.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/26145397253.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/education_logo_designs_templates.pdfIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_d913ee63282a4fe8b32f8b5921cc4309.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd921e81-6c78-4b11-aea6-518fdc5c94f0/munogudinisonapivimamex.pdfIn PDF document text
    • http://tatefubuzu.rf.gd/59011413522.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/the_reporter_online_lansdale_pa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FDE 4308 bytes
SHA-256: afbe85e55fe538a8dbb9ae37dfca2d28499cda6ca2116554d7ec2e9f2ce25a56
font_01_sfnt_off00017e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E72 11172 bytes
SHA-256: 885cc1fbfb34534b01ad0a1b7b9dad3c08d5a235265231a5fe5fd3fc8b3a8431
font_02_sfnt_off0001a469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A469 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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