Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb1532fdd9b0ebb…

MALICIOUS

PDF

77.2 KB Created: 2021-06-09 05:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 985704157fd227817f2f60221d8fbaa1 SHA-1: 91c5bf5386c0c3833314cf30bc96373578ac54be SHA-256: 8fb1532fdd9b0ebbd95cac832d51cc0c994de473abb02196a271961de072170a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to a site that appears to be a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly indicate a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Buffalo 66 full movie online free', suggesting a lure to attract users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://oniceh.ru/pbw?utm_term=buffalo+66+full+movie+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465000/normal_6010a1544d1a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482619/normal_60bcadfc34fd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458413/normal_5fde069270b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_60562f2a44b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_60357a5282eab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481272/normal_5ff031146bce7.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/a2fa0ffa-a3b3-4fdc-9aa3-d6bc7752b69c/what_does_the_colour_blue_say_about_your_personality.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144454332/10860907393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17fc607-d2d5-464a-90ad-33aa64cb821f/how_to_write_a_disciplinary_action_report.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/borg_warner_t5_fluid_capacity.pdfIn PDF document text
    • http://mifudatu.pbworks.com/w/file/fetch/144688878/libros_harry_potter_tapa_dura_salamandra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e4908e-6143-49d1-83de-e9726aa87e2c/sears_battery_charger_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26805c2e-382e-430e-8e86-83bebecaa677/self_destructive_thoughts_meaning.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/gimafurubufezepuzej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb4d6ae-3c84-4ca6-9216-366826351cdb/90847840570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cecc3e8a-12e2-4e0a-b86f-107775019746/can_you_get_dunkin_donuts_gift_cards_online.pdfIn PDF document text
    • http://pefumugat.pbworks.com/w/file/fetch/144540345/seizing_the_light_a_social_history_of_photography.pdfIn PDF document text
    • http://nusometa.pbworks.com/f/pure_maths_study_guide_grade_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df436f6-a54b-4d49-9c4a-55dd918720c1/cuanto_equivale_5000_libras_a_kilos.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_off0000f199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF199 4996 bytes
SHA-256: cbe810ff4e0c625862e04ffede329cf5c0a833c3d75e0a39bae1c6248b22b564
font_01_sfnt_off0001028e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028E 10884 bytes
SHA-256: 05f80ed95755ef50a669bbe42547fba76cecd5df60985563526ea28a7d82cf97

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