Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93ad6e82e6da1fa…

MALICIOUS

PDF

80.7 KB Created: 2021-03-29 02:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b6f7be5fa28e3e2ef66cf7a7b8498766 SHA-1: e02e5ae327ef337e872b5d58abdeea04f05ffc74 SHA-256: d93ad6e82e6da1fa6c3716df4e37de47d4d38a5d6687799cd458cc2d91626de1
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and Weebly-hosted files, indicative of a link farm. ClamAV detected this as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded URLs suggest a phishing or SEO manipulation scheme, likely intended to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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 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.
  • 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=acute+pulmonary+edema+treatment+pdf PDF link annotation
    • https://dimomivij.weebly.com/uploads/1/3/4/5/134504604/0189567792.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/AnjdYgf/wordsmith_software_free_download.pdfIn PDF document text
    • http://budozezofezuje.iblogger.org/2066319661.pdfIn PDF document text
    • https://loxojewumiv.weebly.com/uploads/1/3/4/6/134651611/687d08e9f73c.pdfIn PDF document text
    • https://cdn.sqhk.co/fogunivugame/gipClhe/non-_disturbance_and_attornment_agreement_form.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/Vwibmsb/fun_games_unblocked_66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489583/normal_6030142d0fda7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_600f4fec2b686.pdfIn PDF document text
    • https://cdn.sqhk.co/dulinifijal/iiJjaie/48959335093.pdfIn PDF document text
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/nozuwe-tutedovobuwo-sowoxetoziw.pdfIn PDF document text
    • http://bopodimo.iblogger.org/example_checklist_for_performance_based_assessment.pdfIn PDF document text
    • https://cdn.sqhk.co/bitajububida/dgf2iOc/kadavur.pdfIn PDF document text
    • https://cdn.sqhk.co/korebuxaguz/uojejdS/entergy_louisiana_my_account_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_605d9b2100845.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/tunalefaw-fuboxitaw-venedugebegimi-bebizaf.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/hdW17RR/jamuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/guPjgAt/xebotugoj.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/h9idhcB/dragon_ball_z_infinite_world_pcsx2_save_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_603da0058526b.pdfIn PDF document text
    • http://nepifenimet.iblogger.org/antique_jewellery_designs_catalogue.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_d3898012aa014f0b82588a748a72c396.pdf?index=trueIn PDF document text
    • http://figapow.epizy.com/tikeruniguxuvuxibix.pdfIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_5b17711d195c4c1c9bcea8df13db7224.pdf?index=trueIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_9f5c3953873b4e1ba1e5e9851d7da905.pdf?index=trueIn PDF document text
    • http://pofegafiwej.epizy.com/klavier_rammstein_sheet_music.pdfIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_725061577e80489d9bb55af76cba9538.pdf?index=trueIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_3c525772370142ff8fe2c99ceca6b800.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_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 5212 bytes
SHA-256: 860c89f483d0a0e4ed79523fc18c0f89ef542d44123b06f675044322cc30834d
font_01_sfnt_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 11888 bytes
SHA-256: 3872442323d28d5b78ef452f2a6912012aa17239f105e70e90104740c0dacbc1

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