Malicious PDF — malware analysis report

Static analysis result for SHA-256 419e128998feb61e…

MALICIOUS

PDF

81.8 KB Created: 2021-04-28 23:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19835c5d75c3e0a09c33e6355f9fb86e SHA-1: 716855a88913554bce8095caf7b9a25c00893aa2 SHA-256: 419e128998feb61e8e3b1023c8994045c96d089828aa92e934a75e953ab85608
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a tactic to drive traffic to other sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=why+can%2527t+i+play+my+dvr+recordings
    • http://cmbclientes.com/lamuwubt6e9b.pdf
    • http://luchdobro.site/vuroze76nna.pdf
    • http://smartline58.ru/apprendre_python_38wyto.pdf
    • http://chambrely.xyz/joxipiwemaxofefomidoboq9od.pdf
    • http://vseti.life/45684607961wpfn2.pdf
    • https://cdn.sqhk.co/fofodafexadu/Uayjfja/rorizawubalidotelidej.pdf
    • http://kzrovk.xyz/88204226478mfqri.pdf
    • https://cdn.sqhk.co/rizavoxaje/igIfrie/dutoxuxazevawuno.pdf
    • http://megantv.site/8813383659qo37m.pdf
    • http://perfectiona.online/vesisatiwudaxorelejoludj70m.pdf
    • http://istlan.fun/705929440204z97h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4012ea30-d251-4786-8549-59ef17a411aa/dispute_resolution_methods.pdf
    • https://70a023e4-b173-4b34-8ac5-854d526a16b0.filesusr.com/ugd/5aec30_b4d9732094c64a72ae41b43b962d6156.pdf?index=true
    • https://uploads.strikinglycdn.com/files/97f437ad-182b-4840-90c2-39eb063e6425/realidades_2_capitulo_6a-3_guided_practice_answers.pdf
    • https://uploads.strikinglycdn.com/files/8418464f-42c4-4cf7-aa08-3d9385b40761/how_to_enter_adjusting_journal_entries_in_quickbooks_online.pdf
    • https://uploads.strikinglycdn.com/files/62caa354-aa2a-4faf-af7c-dfd2609552e3/4798804502.pdf
    • https://uploads.strikinglycdn.com/files/02bd6651-38cb-460d-80fc-95ac2529a0dd/stinger_on-the-go_bug_zapper_racket.pdf
    • https://uploads.strikinglycdn.com/files/ab887c3d-95ff-403d-8e37-eb3c3cabb963/how_to_make_google_cardboard_at_home.pdf
    • https://uploads.strikinglycdn.com/files/84250607-1665-485e-b0f0-8cdaa182d7d5/the_entertainer_personality_traits.pdf
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_5564b4112a824958911745f0cf2e7bf2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2abf677c-445e-4c6e-ba1d-0860dd9a8f96/battlefield_4_reloaded_kurulum.pdf
    • https://uploads.strikinglycdn.com/files/95f6319e-4f48-49b6-b167-2473da410688/nurebok.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd50.bin
e6a65225255bdf9b61b314f7d1c8f9b140ada21f1bc16dfe34677cc0cdd28b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 5696 bytes
font_01_sfnt_off000110a6.bin
7e7737bd7be975ba5085e938d0f032a920da31b387ac41a20d018496b6409950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110A6 11404 bytes

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