Malicious PDF — malware analysis report

Static analysis result for SHA-256 971c6edabbf2c71e…

MALICIOUS

PDF

71.9 KB Created: 2021-03-03 16:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d720ce0f49fb933fed4def3ab5b98f0c SHA-1: 5deb4360ceeac8687840b373746a016d24d4cbff SHA-256: 971c6edabbf2c71ec0679641806beb5e7d6bcfcf867e8457db005e9307a10175
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains keywords related to 'cheats' and 'no verification', suggesting a lure. Numerous external URLs were extracted, many pointing to disposable domains and link farms, which are commonly used to host phishing pages or redirect to malware. The presence of embedded URLs and the overall structure strongly suggest this PDF is designed to trick users into visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/wix?keyword=animation+throwdown+cheats+no+verification PDF link annotation
    • http://sijemogezabusa.sportsontheweb.net/gujezadute.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/95978968565.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/jhdgitP/jexexomerijewaxaxakejuwoj.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/theory_and_practice_of_counseling_and_psychotherapy_exam_questions.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/62930331067.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/jatRjay/the_nutcracker_russian_ballet_music_box.pdfIn PDF document text
    • http://desokore.medianewsonline.com/who_needs_to_be_iso_27001_certified.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369768/normal_5fe3c7b73fc61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452382/normal_602116f3d0ed0.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/mugepanopomepabubulotisid.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/nsc_defensive_driving_course_coupon.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/jejojasoxo.pdfIn PDF document text
    • http://sazaleve.22web.org/tui_sutherland_wings_of_fire_series_order.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafoxakonefa.epizy.com/sample_json_object_c.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_off0000dd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 5372 bytes
SHA-256: 00f218a8dfc3e6bf5fbccd3f8ec87a9bdc614adab0cfe639c20b44ef95b56983
font_01_sfnt_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 10308 bytes
SHA-256: fd88355df821a7f1bc08ab684e62fbd19a38ad57f35cd5c34578e9ecfd112132

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