Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9439da11e0e847…

MALICIOUS

PDF

69.8 KB Created: 2021-03-08 08:24:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c9cc00e78c6b235156e2cdb7ccfb473a SHA-1: 3deb16f72ccff81e19b5dffda14ac3837bd339f4 SHA-256: 5f9439da11e0e8479bd69fb50932c768afe71d53033f6dd86333244ac42cdad0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded links suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=heat+n+glo+dealer+near+me PDF link annotation
    • http://manovina.mypressonline.com/how_to_connect_apple_bluetooth_mouse_to_ipad_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/gjfiiib/klondike_adventures_cheats_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/cFhfkWe/41356859808.pdfIn PDF document text
    • http://csxmoney.info/roxixariduwowewurelakefamvu3u.pdfIn PDF document text
    • http://bitcoins-profits.com/27237009128oplf4.pdfIn PDF document text
    • http://getallcreditscores.info/julilezutosewikub9ewh1.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/hEIClgf/warframe_limbo_prime_neuroptics_farm.pdfIn PDF document text
    • https://cdn.sqhk.co/nidaruzada/gNRhdie/46448450617.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/95136153383.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hh8msij/sugirev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_6c4ca8acecd04304a06e99e5fcac2a44.pdf?index=trueIn PDF document text
    • http://fidegaf.atwebpages.com/31511119123.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/sync_outlook_2003_calendar_with_android_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80390ffe-c2b0-40cf-8fbd-664e23a0ab0b/mass_effect_3_automated_turret_schematics.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/97091060422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225dd965-0b28-4652-8b80-c2869b55ff97/xinowefugabeponud.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/economic_system_history_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b92e15-1cd9-4c1a-8075-e4d9a08b9940/73966754070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86784122-e6c3-4f97-bcfc-f490e9cdc527/kirby_vacuum_cleaners_near_me.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_52ccbfad920c457988e810c6f7c68651.pdf?index=trueIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_063b34fac2404d7aa4f04031f4610c06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/38311885003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2688d1f5-ccfd-4ba0-85df-869ed8301ec5/can_i_still_take_my_drivers_test_during_covid.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_2e9c07192ed14579a67a8570bab167ca.pdf?index=trueIn 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_off0000d714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD714 4928 bytes
SHA-256: f26bb25ae155c777180d42b9aa48752b6a64febcb9a6c672c86200c5954023f5
font_01_sfnt_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 9952 bytes
SHA-256: 995a3d38e3da2def744a35a4688a4c39d27c3a1d0824dc33ddac581c1afd4305