Malicious PDF — malware analysis report

Static analysis result for SHA-256 7257dc393a970b1a…

MALICIOUS

PDF

81.8 KB Created: 2021-04-01 10:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 78c2158df7ef8e7b940ff1b15f9776c7 SHA-1: 518f532ae6986b431897f792c313b0f10e5cec95 SHA-256: 7257dc393a970b1ad978e955c5bf94c0c733bc8b6b4bdf153cb735080fb5b6ff
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 0.9991

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://midufefew.ru/123?utm_term=free++tema+power+point+animasi PDF link annotation
    • https://cdn.sqhk.co/lizuxutagisu/AcIFjie/neurosis_definicion_psicologia.pdfIn PDF document text
    • http://magic-spring.com/what_is_a_certificate_of_compliance_in_divorcexqylc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469633/normal_5fe0ff482488b.pdfIn PDF document text
    • http://classkaod.ru/colt_ar_15_instruction_manualseeat.pdfIn PDF document text
    • http://otomail.business/9957607886499icw.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/73796491477.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/tifizunipelakoxonorufok.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/fjijaha/vocabulary_workshop_level_f_unit_1.pdfIn PDF document text
    • http://prosucre.pro/38805506281z5xu5.pdfIn PDF document text
    • http://nakanilo.club/noxararexusajsgbfh.pdfIn PDF document text
    • http://sokfresh.fun/hp_4500_printer_ink_cartridge_replacementoa17v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_602923cf96fae.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/gisadegof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368218/normal_5fe1354ea3bda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385617/normal_5feb7286d99be.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/jihihdn/fuxozarijakavubiridobenuk.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/G4geggM/carnival_ring_toss_game_supplies.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/cpB4Dia/black_desert_mobile_patch_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/dagivuforupo/gicicjj/zilovesixapeguw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467318/normal_602afc45e7a4c.pdfIn PDF document text
    • http://zoomita.space/jolly_phonics_assessment_free05wqi.pdfIn PDF document text
    • https://cdn.sqhk.co/golizojuw/gemhdhd/electrical_calculation_canada_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/d9hdgji/88624917894.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/management_aptitude_questions_and_answers_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10102 4980 bytes
SHA-256: 0c50247b05ba1113d3afa2584a09cdab5ed2fb5366a3b4203c443213425e79e9
font_01_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 11020 bytes
SHA-256: b12099826566ae0267afc2146e8e67443f67bf4291bff07eb147d229dfcaa1b2

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