Malicious PDF — malware analysis report

Static analysis result for SHA-256 2990e62f2cd92a92…

MALICIOUS

PDF

68.1 KB Created: 2021-03-14 16:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4aea314b1439d45c2d0730b9e05be75b SHA-1: 2532de5b80c4c512b45f5e83eb4d2b9249689d7b SHA-256: 2990e62f2cd92a920945660fa3139bf2145f79811ac099742146c9725025f51a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by heuristics as a link farm and potential phishing/malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=printable+alphabet+tracing+sheets+for+preschoolers PDF link annotation
    • https://cdn.sqhk.co/negenowiji/LgcQhfb/xafugapibozexerewofut.pdfIn PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/xikasowesogis-zegidanofuvurip.pdfIn PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/1238773.pdfIn PDF document text
    • http://naturebiolog.space/51075424716zmdm0.pdfIn PDF document text
    • http://mufinofol.scienceontheweb.net/daxatolafasorasokujur.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/RibiawC/oneplus_theme_for_redmi_note_7_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/hbgifgi/7th_continent_fear_the_devourers_review.pdfIn PDF document text
    • http://mufinofol.scienceontheweb.net/calendar_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/ahgj8jf/86117098749.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/malaysia_business_law_exam_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/fjhhbjf/23713866476.pdfIn PDF document text
    • https://mazazujusuvazix.weebly.com/uploads/1/3/1/8/131856432/jafanifesavaver.pdfIn PDF document text
    • http://wordwild-store.com/biwolunovo86jfx.pdfIn PDF document text
    • https://gofuzuxelizexo.weebly.com/uploads/1/3/5/3/135391542/kabopovijevopumonufa.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/4ccdade1-7d7d-47ba-bf88-4cdd35a0aba2/98107644706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5f9e19-dca1-49bc-8f75-1b7bb9aba190/survival_courses_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35586b4-4dd8-47b7-a80b-0ef4a98464a7/hunter_road_force_balancer_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98325ef-3b09-40d8-9f7c-68c85ebe5fdc/cool_aa_meeting_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fc4219-631a-40b6-b597-bf3ee2e537ec/mejores_frases_del_amor_en_los_tiempos_del_colera.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/nikon_n80_manual.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_off0000cf0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0B 5420 bytes
SHA-256: c52f9db2f68d59f28ff675eadd50b5f0621ddbd0f4ba8a641084236cffa2e84d
font_01_sfnt_off0000e16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 9752 bytes
SHA-256: 9265b9eca25d9128f445f79602d837687a2b6ed7c61c016ac7808a30f2bab12e

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