Malicious PDF — malware analysis report

Static analysis result for SHA-256 921411dc082c18fc…

MALICIOUS

PDF

79.5 KB Created: 2021-03-30 07:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 30fc0582d6717c3e9aa714af055ec40d SHA-1: 8d0c5ccd1250b0eccb59bf5b3c4b3a594631fc9f SHA-256: 921411dc082c18fc3fcc4eb16e454f7eedc1c641c47d661d9523aed654c880fd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, suggesting a link farm or redirection mechanism to deliver malicious content. The document body, though partially corrupted, contains text related to tutorials and manuals, which is a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/strik?utm_term=xln+audio+addictive+drums+2+tutorial PDF link annotation
    • https://vagenovujod.weebly.com/uploads/1/3/1/3/131398358/4072175.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/polipenufesa.pdfIn PDF document text
    • http://bulibujirifubof.scienceontheweb.net/easyacc_power_bank_model_pb10000c.pdfIn PDF document text
    • http://reawolt.online/birthday_homework_pass_printableshders.pdfIn PDF document text
    • http://ilmahli.com/585888515674w444.pdfIn PDF document text
    • http://zumbayuliya.online/the_entertainer_sheet_music_beginnerwjzap.pdfIn PDF document text
    • http://liketime.online/liebestraum_piano_sheet_music877iv.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/motu_proprio_aperuit_illis.pdfIn PDF document text
    • http://runmasten.online/nukolezalererfxvu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/mtd_lawn_mower_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/raxuxiferakilejadut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bacae3e-0d5e-4279-8367-7568a3907bc8/50952326456.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/effectiveness_and_efficiency_in_good_governance.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/aadhar_card_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec92088-720a-4d49-a95d-55977fb42d49/fulukoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33919c6a-ed89-49a2-b14b-8ffc19d023ff/journey_to_the_west_the_demons_strike_back_full_movie.pdfIn PDF document text
    • http://tosurok.myartsonline.com/88358313378.pdfIn PDF document text
    • http://gavawekib.myartsonline.com/27541729980.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/52_week_money_challenge_2020_excel.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/losijurusefabiwidezuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5318012-245f-420c-bb17-93d098adaf89/tunamukalomizapagovukimo.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/how_to_draw_chiller_monsters_werewolves_vampires_and_zombies.pdfIn PDF document text
    • http://gemawinikifiv.myartsonline.com/nidipozilenerifim.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_off0000f5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 5252 bytes
SHA-256: db6623cc46c6e7a1c47bc25d014ef36b24336584afb062aa0847aaa08086ad68
font_01_sfnt_off000107c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 11416 bytes
SHA-256: 0f6fd4b1e054e054ecf55493f763b6bd6db892ed79c64dc69c3ed43ad2709747

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