Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d5d5542b723e0a…

MALICIOUS

PDF

98.9 KB Created: 2021-04-19 15:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 27cf98ae3aba8bc94e57d66078a3e69e SHA-1: fcc3d5eeca2b5d4e3cbe477fc3149c40761942cc SHA-256: 68d5d5542b723e0a54a48597b656fe44dc14bd88b17e81e2c1823061b0c6fac9
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation, likely to disguise malicious content. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious intent to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/strik?utm_term=adobe+premiere+elements+14+tutorial+pdf PDF link annotation
    • https://cdn.sqhk.co/jimevexir/kejbpgf/formula_car_gt_racing_mod_apk_unlimited_money.pdfIn PDF document text
    • http://cocobuka3.xyz/mutebasepuxitixp00it.pdfIn PDF document text
    • http://qlemelest.online/le_bistro_automatic_pet_feeder_manual0cziz.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/gdgeStC/2198019762.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/cpif4ih/25062191450.pdfIn PDF document text
    • http://fitdieta.com/live_streaming_android_app_tutorialgaiag.pdfIn PDF document text
    • http://gbo.guru/turning_for_profit_into_nonprofitsbgk3.pdfIn PDF document text
    • http://texno3ua.com/el_dador_resumen_capitulo_1dbskp.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarimeg/b1jbihw/live_in_five_pro_apk_free_download.pdfIn PDF document text
    • http://kengoru.space/alkaline_diet_plan_for_weight_lossnc9lt.pdfIn PDF document text
    • http://vefejukexasiku.iblogger.org/psychological_assessment_report_example.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/ZjdBRdC/blades_of_brim_mod_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/tCifYqs/dofazidebinat.pdfIn PDF document text
    • http://216tilford.com/medical_surgical_nursing_free_downlod15wn.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/fOhaidg/21070846922.pdfIn PDF document text
    • http://begemotiks.fun/pasunevunof23eef.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/iSHuNRx/4343867614.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/81750877379.pdfIn PDF document text
    • http://pisisagul.epizy.com/what_color_does_not_absorb_heat.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/database_example_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/what_is_the_purpose_of_conclusion_in_research_report_mcq.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000144fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144FD 5456 bytes
SHA-256: 743730d01f4a7756c057649a92d8d8f081597a5a14fe35e7f9a81a05e580fd48
font_01_sfnt_off00015773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15773 11244 bytes
SHA-256: 88150b2cd4e58c34a143272416f77a439e7ac4f77ec26ff44d286ee9505c40d5

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