Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6db4e413501a4d…

MALICIOUS

PDF

78.4 KB Created: 2021-04-26 14:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0345eabdff87abc6b8a0beb65a213bac SHA-1: 19a3c0a3882e7339c679a7b9e745178fdf572e72 SHA-256: 2b6db4e413501a4dfe195fac020f6cfc4a6c498a41eb16e23e7d19c96079e61e
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://xajibur.ru/strik?utm_term=golf+buddy+voice+2+gps+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409610/normal_5fd051dca763f.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/black_and_decker_rtx3s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416935/normal_5fddd1e7577e0.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/cHjilyr/49059266694.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/algorithms_sanjoy_dasgupta_solutions_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_6043680720d84.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/livre_agriculture_biologique.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_6037e924beb72.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/hcJQ41H/62721878338.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/fmhj4je/adorable_home_game_cheats_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_603c27c16ac36.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/a0dad2b5-bdf4-45d0-ba9e-f33845ce663e/dell_inspiron_620_motherboard_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6017853-d1c5-4606-8dde-48dcf38a5fec/godugirafosadisixiwoki.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/ark_survival_survivor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ed6693-a56d-47a3-926f-628f3cda888f/what_are_the_9_principles_of_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83c8daf-8c2a-48ac-86bf-fc86f57f6eb6/the_missing_piece_taiwan_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/gemimaferom.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/gamestop_black_friday_2020_ad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2699c2e7-ee97-4cfa-84eb-e83c8b57eb63/69978377550.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/hoover_power_scrub_deluxe_spinscrub_50_carpet_cleaner.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_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 5668 bytes
SHA-256: bb5a681157935e6afd93152f578f6756aaca9595589ded345c154a2b5b6d517f
font_01_sfnt_off000106bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 10964 bytes
SHA-256: b06b0a218b6ea384d4eba986ba9db75f20c16797be5978ee7b36e76870eec2ef

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