Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a6f5807b2aae05…

MALICIOUS

PDF

73.7 KB Created: 2021-03-13 23:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ef25b3a02f824977319f0ed3167cf1d6 SHA-1: d4d5a5281bdd699c1a60910f704db968b4e6d276 SHA-256: f0a6f5807b2aae059ec3e9995b2269d228127d7ad29e466ced994a6f85718168
126 Risk Score

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 0.9997

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://mezovuduw.ru/123?utm_term=chamsys+magicq+user+manual PDF link annotation
    • http://kugetogegus.iblogger.org/tenancy_agreement_template_word_document.pdfIn PDF document text
    • http://nawoxir.22web.org/download_manga_tales_of_demons_and_gods_sub_indo.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/OqNAha0/abba_greatest_hits_tracklist.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/psion_handbook_3.5.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/MMIhahj/my_indpay_app_is_not_working.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/literal_equations_define.pdfIn PDF document text
    • http://womumonafip.22web.org/77507278305.pdfIn PDF document text
    • http://romabeveseruzor.22web.org/lecture_ready_3_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/4iagdjc/taxi_sim_2020_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dce09894-55e7-49e1-9c43-b94069c58f23.filesusr.com/ugd/11ae40_d981ea893d594555bd436fc67241e845.pdf?index=trueIn PDF document text
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_947fbaff5b6a411294db80b880dc5345.pdf?index=trueIn PDF document text
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_a760cd73b11a43688589a6b2757093a2.pdf?index=trueIn PDF document text
    • http://zifezerolivuba.epizy.com/how_to_reset_the_bottom_ice_maker_on_a_samsung_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/80868347427.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/59413279352.pdfIn PDF document text
    • https://2f7d580b-0495-488b-bc2a-62e179810383.filesusr.com/ugd/3835dd_eb96fc6e25b141f0bab5ab20ccbb0627.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/torajamimokajevivisujonov.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_6b4cb6d3be3e44799d182e403185c97e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/how_to_set_up_graco_pack_n_play_anywhere_dreamer.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/how_to_find_the_area_of_an_isosceles_triangle_given_3_sides.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/18559688812.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_off0000e3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B6 5344 bytes
SHA-256: e3daa54be38815afac29d29043be06a3c5b1a85da7dec743f2046ffe213d4b1a
font_01_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 10472 bytes
SHA-256: c468f8264ffebf345770af77aa05bf520ef8bd8b5c2809b658929d8ca809f1b2

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