Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fda7db4c12e7a8d…

MALICIOUS

PDF

83.8 KB Created: 2021-03-14 10:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d69a11649f01747aaa9624c196fafc96 SHA-1: febbba2c5df32311045af3509ebe6a7847719f01 SHA-256: 4fda7db4c12e7a8d79a79fa98e8ea804f8c4ce96df73ee1d269ce85bf404b8a1
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 0.9994

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://gimoguvi.ru/123?utm_term=vehicle+daily+check+sheet PDF link annotation
    • http://boost-shop.xyz/lebuwinosojibamgk85.pdfIn PDF document text
    • http://parrrtner.xyz/insinkerator_evolution_space_saver_parts_listxgzg0.pdfIn PDF document text
    • https://kofaxikizija.weebly.com/uploads/1/3/4/3/134336932/7049150.pdfIn PDF document text
    • http://intekzafast.online/poperulirogebejedadezbjip0.pdfIn PDF document text
    • http://bonusiotsbera.online/bosch_classixx_5_user_manualevud3.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/lafujalixa.pdfIn PDF document text
    • http://hotsales-com.xyz/govexupjupf.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/11742701416.pdfIn PDF document text
    • http://detonic-shop.website/alesis_midiverb_4_manual_espaold9z9s.pdfIn PDF document text
    • http://medemukiduba.sportsontheweb.net/how_to_set_up_moultrie_mobile_camera.pdfIn PDF document text
    • http://bred-enligne.com/74990920596ttyh1.pdfIn PDF document text
    • https://jezasozogederek.weebly.com/uploads/1/3/5/9/135960593/7138978.pdfIn PDF document text
    • http://newsportstechnology.ru/how_to_day_trade_stocks_for_beginnersmfyzk.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/hoover_windtunnel_t_series_pet_rewind_belt_replacement.pdfIn PDF document text
    • http://grizhoff.ru/75584515027yuunn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_bbc85d862a9c43f4a8a26f4fda9b6b69.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3d077b-fa9c-4a50-9a54-7826fdc43c81/lutalatoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b33a273-d16f-4ead-bb68-9ae0b01b48d3/16274766311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f037e1d4-df00-4fce-853d-c083a31cad79/college_board_sat_practice_tests_book.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_b35d272e9b2b4fe6a67c2ff096694809.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c580660-fe75-4043-bdf3-5d797faf079e/cual_es_la_mejor_app_para_aprender_ingles_para_nios.pdfIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_47e12b4d5f5341e2bd108c139a64d072.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfb9379-b6f1-422b-80cb-4cb370327e6a/do_dogs_ever_fall_into_a_deep_sleep.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_off00010c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C56 5064 bytes
SHA-256: 6551c52533c7b3ed80ca8f61a51cb13751022ab6e7045b847b34df5700d88173
font_01_sfnt_off00011d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D98 10920 bytes
SHA-256: 76be99a73890f897cbb5dc563078c0a340af1fed456adcaf9310ca5892587a9b

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