Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb75c5cf02f82870…

MALICIOUS

PDF

87.5 KB Created: 2021-04-04 21:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 18e035e9264961ee577a5bb564065526 SHA-1: 84f4d96f1e386ce06044768d6d852274b197da87 SHA-256: bb75c5cf02f82870c04190d113031fac5b95676c70476fbd524fa83ff2ef5a27
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 0.9989

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://seumenha.ru/wix?keyword=find+the+car+puzzle+solution PDF link annotation
    • https://cdn.sqhk.co/kibedutej/pLhgtQA/rhode_island_game_warden_jobs.pdfIn PDF document text
    • http://top-salez.site/dinebesasapo0usm4.pdfIn PDF document text
    • http://pankreatitum.ru/blackbird_fly_beatles_chordswbsx9.pdfIn PDF document text
    • http://timecodes.net/98232112748oudo7.pdfIn PDF document text
    • http://remont-pc.website/mepegavajiqhs3g.pdfIn PDF document text
    • http://mynasert.online/how_often_is_the_civil_service_exam_given_in_nyn0v12.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/ibsNhdW/tewebafajagewodadoweneg.pdfIn PDF document text
    • http://workmonster.net/rinnai_ventless_gas_heater_reviewsnrq3d.pdfIn PDF document text
    • http://sweetygirl.club/waring_pro_waffle_maker_wmk300gn95g.pdfIn PDF document text
    • http://malespw.xyz/pokemon_insurgence_friend_safari706hf.pdfIn PDF document text
    • http://xobukafa.iblogger.org/dixolivalan.pdfIn PDF document text
    • http://ouily.xyz/gopro_hero_4_silver_price_philippines_2019e47mi.pdfIn PDF document text
    • http://bigtittybella.com/curso_online_sistemas_de_informacion_geografica3114b.pdfIn PDF document text
    • http://juluzenaluziwo.22web.org/company_profile_sample_for_construction_company.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/vifjjgH/69602612584.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/3uhaqcy/tegufijili.pdfIn PDF document text
    • http://persequen.com/red_fox_go_kart_engineea1x2.pdfIn PDF document text
    • http://ita-bio.fun/bewarflm4v.pdfIn PDF document text
    • http://cybety.xyz/68489127034aaq6i.pdfIn PDF document text
    • http://milanbeach.fun/sirerapaziwapejepepumumfrz2.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/WieGeha/firefox_for_android_4._0.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
    • http://rujugojokukasav.rf.gd/korutosovebokorodelomef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0316a0-0acd-419a-906d-e5929c67af75/ruxatejuxagatisawakemoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d6e6c7-fbab-4b94-b260-cc2a95cfe4b0/74046024675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4e5db7-35a4-4924-9703-e1223c08fab5/webasto_heater_service_uk.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_off00010afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 5048 bytes
SHA-256: 429ef9da5a2d742178276ff1979faeb670952c70f11d2b9e9c69da0983cbc845
font_01_sfnt_off00011c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 11112 bytes
SHA-256: 183b25fb89d035e4c1677740464e957c85dffc3b9f33ffaff4d939d1ea3a80bf
font_02_sfnt_off00014213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14213 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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