Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d9a8f77e7f0ac1…

MALICIOUS

PDF

83.6 KB Created: 2021-04-29 18:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fdd8008089cbb6e74f4b2ca327faac74 SHA-1: 634a6f8b227c63ed16f0378bb7d5f07706f77936 SHA-256: d6d9a8f77e7f0ac1c17a9ce253963ade56c2ea6de56b5a3b99335f87c3f3d74c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, suggests a lure related to creating birthday invitations, which is a common tactic for phishing or malware distribution. The presence of external URIs indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=como+fazer+um+convite+de+anivers%25C3%25A1rio+pelo+whatsapp PDF link annotation
    • http://rezotu.xyz/ps2_games_for_android_emulatorau79a.pdfIn PDF document text
    • http://pravagims.net/252037202346mg5j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_601392e48c778.pdfIn PDF document text
    • http://winoorama.site/68918857858pnpnj.pdfIn PDF document text
    • http://formblckr1.xyz/how_much_does_a_nutritionist_make_a_year_in_canada3jb2w.pdfIn PDF document text
    • http://vaborogi.22web.org/35733001077.pdfIn PDF document text
    • https://rarejiwu.weebly.com/uploads/1/3/1/6/131606055/xuwenaragekuxateb.pdfIn PDF document text
    • http://norelowugazilu.22web.org/modadovamonowumogudu.pdfIn PDF document text
    • http://tronreserve.online/72731637598hrgw5.pdfIn PDF document text
    • http://tameeniraq.com/coleman_powermate_2500_generator_partskk11d.pdfIn PDF document text
    • https://leniwexobopusez.weebly.com/uploads/1/3/4/7/134713406/1508804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_6042010a5e90f.pdfIn PDF document text
    • http://tugawuwumix.22web.org/quantitative_correlational_research_design_example.pdfIn PDF document text
    • https://vinenuji.weebly.com/uploads/1/3/1/4/131453259/kunuxogewidubo-fegofewosul-dokupewe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391000/normal_5fe2640585f7a.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/lifajatevod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500669/normal_6001cc31328ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixasosuj.epizy.com/76218139630.pdfIn PDF document text
    • http://malakevuxe.epizy.com/botanics_hydration_burst_face_sheet_mask.pdfIn PDF document text
    • http://nojofogenobad.epizy.com/11188422697.pdfIn PDF document text
    • http://lapesuzimu.epizy.com/lymphatic_system_organs_and_functions.pdfIn PDF document text
    • http://gametusepezuka.rf.gd/venaragerufimaxenakarub.pdfIn PDF document text
    • http://fapiruligifujo.epizy.com/disney_world_schedule_december_2019.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_off000102e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E2 5736 bytes
SHA-256: 7e6566d22b316540eb37ef0f190c40962c69feef3da26ffcdee46f41f3737778
font_01_sfnt_off000115cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CB 13016 bytes
SHA-256: 7be06ea77d2ecaeacb8e71c00a9071fa1e479df2c61db09fe7cae107608d422e

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