Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da33fe0974b28a8…

MALICIOUS

PDF

74.8 KB Created: 2021-03-05 06:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d3dd0c8f1e82c8ce50b9440bc66b68b0 SHA-1: 178bf88e154b8ac954e2bb65da2ac5871f614ff0 SHA-256: 8da33fe0974b28a8b9d83b33218d28871d207880bb535c351e4620ef3cdd4107
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing campaign. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/wix?keyword=koopa+revenge+2+online PDF link annotation
    • http://intekzafast.online/arbys_sweet_potato_waffle_fries_nutrition_facts0yzvc.pdfIn PDF document text
    • http://womans30planet.com/best_story_games_apko296s.pdfIn PDF document text
    • http://opendouche.xyz/what_does_child_led_play_meanen263.pdfIn PDF document text
    • http://lofitner.buzz/roms_emulator_psp_androidixwuz.pdfIn PDF document text
    • http://checkyourcredit.info/color_blocks_game_free2y592.pdfIn PDF document text
    • http://vigastlens.xyz/vimapujo4or.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470678/normal_60035482a0c87.pdfIn PDF document text
    • http://xbet1.fun/wenofunabefejiwureo2z1.pdfIn PDF document text
    • http://xxlmature.site/681397720201vzwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_602cd91e5e85d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_602ab38052d60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495251/normal_5fe2dde20cff0.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/52780c57-5dad-48ad-911b-3b4e4ebeca6f/32885329599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca9d7950-9c4c-4d94-bfe3-b2db731d5abe/canadian_blue_book_for_used_cars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db2d9be-c435-46a4-befd-e656def14677/why_afraid_of_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb189a2d-b240-4ae0-8444-2ef41a5ffd6a/why_he_disappeared_evan_marc_katz.pdfIn PDF document text
    • http://porilebunenagu.rf.gd/how_to_save_google_maps_route_on_pc.pdfIn PDF document text
    • http://modunatotuw.epizy.com/garexes.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/hd_video_recording_android_app.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/solving_equations_by_cross_multiplication_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9b58d6-ce8c-48d1-8e7d-7836e17e0548/how_to_use_your_phone_as_a_remote_for_vizio_tv.pdfIn PDF document text
    • http://pejezal.rf.gd/2580846826.pdfIn PDF document text
    • http://wiwolobeduju.rf.gd/adobe_illustrator_tutorials_in_tamil.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_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 4968 bytes
SHA-256: 7f7229ec20cdef8418a7d8b22adbf9d7f431e55a46c01972612d026a70fe7e2d
font_01_sfnt_off0000f9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 10444 bytes
SHA-256: bd19b8fa13d6c1e9907e45deb11fec15acadea18370fe8d2eededbfac222aeae

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