Malicious PDF — malware analysis report

Static analysis result for SHA-256 80daaea7721bd1fb…

MALICIOUS

PDF

74.1 KB Created: 2021-04-17 21:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6867c41dc787c135fb70a48e4e04d491 SHA-1: 56bb1b843300aa8e2bc5027c0e84b81a38278e80 SHA-256: 80daaea7721bd1fbaa649397c0288f4677955b01c3e95a29c1452aedf95ecff5
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 0.9998

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://kuzutuzo.ru/strik?utm_term=yamaha+clavinova+repair PDF link annotation
    • http://vnds-v.website/72731337431eu81s.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/dhhgcgh/vovukuposebadavenikusan.pdfIn PDF document text
    • https://cdn.sqhk.co/kofosenolo/higixic/royal_caribbean_alaska_cruise_tours_reviews.pdfIn PDF document text
    • http://xakuneferufilew.iblogger.org/how_much_is_behringer_mixer.pdfIn PDF document text
    • http://musc-media.xyz/geresuz17iiy.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/2u4ggha/wolf_wallpapers_iphone.pdfIn PDF document text
    • http://aycotoro7.xyz/how_to_gift_shark_cards_on_xbox_ones36ov.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/ijfILij/vineyard_valley_match_blast_puzzle_design_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xexitotikix.rf.gd/incapacity_hearing_notice_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a1dc52-24c1-4ae9-8f30-829c63292f94/the_revenant_full_movie_download_in_hindi_480p_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73eb986a-a2a0-46cf-873e-90d62e205c32/kenmore_front_load_washing_machine_clean_cycle.pdfIn PDF document text
    • http://sazevaxorofezag.epizy.com/folelefusesefaxunafap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8888d880-eadf-404b-81ca-926f9478a46e/21885058328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a37f7c5-7f08-497a-9a3e-f34e5881004c/65625553621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b0bccf1-9243-4190-b846-3e59fb811962/the_stranger_author_harlan_coben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47773c38-f594-49ea-aa30-5942a94897c4/kitchenaid_double_oven_range_self_clean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac8c62de-d664-48d4-a201-7a3802c5d4d9/2214766381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7fe2ce-2e96-4762-bc1c-6aeccbd199c6/3264153700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bced594c-b137-4b87-8ea6-a1ce263a1163/interview_questions_and_answers_for_client_service_manager.pdfIn PDF document text
    • http://www.yamaha.com/In 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_off0000e494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE494 5016 bytes
SHA-256: 6536914b2c4b9c33c61c316a6937e7a602db65cf6d4e47e6ce20656a1f26bf23
font_01_sfnt_off0000f586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF586 11224 bytes
SHA-256: 36b400f1365bd892b625683eabcb2a4d0fb75189475bffc640a6b2878fe0c327

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