Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dd421d557a2531…

MALICIOUS

PDF

81.3 KB Created: 2021-05-03 12:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 62a2193cf046ffec6d6973756f33533e SHA-1: 2846cad671a296ce42f2f441a4a8f5a4970a783f SHA-256: 38dd421d557a2531dc7c637422926edba3cea09392d550c52225ef6da180f4fe
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The primary external URL, 'https://lozipotod.ru/strik?utm_term=craftsman+17+hp+riding+mower+manual', is likely the intended destination for victims, masquerading as a product manual to encourage clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 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://lozipotod.ru/strik?utm_term=craftsman+17+hp+riding+mower+manual PDF link annotation
    • http://xejepurefe.scienceontheweb.net/18766710025.pdfIn PDF document text
    • https://lijemokuw.weebly.com/uploads/1/3/4/8/134853622/7149996.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/5139804.pdfIn PDF document text
    • https://bidefajiwi.weebly.com/uploads/1/3/4/0/134096082/58cbb.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/convert_to_word_acrobat_professional_7.pdfIn PDF document text
    • http://vomoliba.scienceontheweb.net/waxakebu.pdfIn PDF document text
    • http://joxezorov.mywebcommunity.org/exercise_on_subject_verb_agreement_for_class_4.pdfIn PDF document text
    • http://budofibo.mygamesonline.org/physical_properties_of_alkyl_halides.pdfIn PDF document text
    • http://rufawefojag.sportsontheweb.net/t_maxx_2.5_engine_specs.pdfIn PDF document text
    • https://mepogazab.weebly.com/uploads/1/3/4/5/134501519/diketixalezumemox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efbd5dc-23f8-47c1-868a-e95fe6cf8fc9/wogovisoweki.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_e6fc2d1f24ae45839a18266653ea0d30.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/353393ae-7781-4f5d-b96f-8129d65e1df7/conjugaciones_de_verbos_en_ingles_en_todos_los_tiempos.pdfIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_c0fb8dd7ba694f18b60a29133265bbbc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e5ed19-7385-4047-b6c2-8b1253e85b2c/outback_flexmax_80_manual_espaol.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_da6987ed1680407f9f0d5e5eadd80889.pdf?index=trueIn PDF document text
    • http://jugomirusulove.atwebpages.com/nalapemepugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1f57db9-7e57-46f7-96d0-755fd54386f2/jack_reacher_3_trailer_2019_izle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8cf5b7-e060-4253-a573-fdf9ebab144c/bazofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9257648a-8318-420b-ba2d-6cbb0fc6e6a3/english_grammar_test_upper_intermediate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a455b298-358c-4939-a3d0-f5d0bb1c56c8/86154004796.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_eba4bcc7ba1e4f30a1d48e07fde7d544.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca391531-20e8-4c49-8e47-e26b81b379e3/36_questions_that_lead_to_love_reddit.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_off0000fe05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE05 5584 bytes
SHA-256: 23cf8584f27ac59b2ce5883f934a662fa0647d37c7899cc9cfd09cd93e5afaad
font_01_sfnt_off000110fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 11500 bytes
SHA-256: 5cfc062354dc76d8f449ac3f554c246d9ea88d37d55202b72210b7c3748c11bc

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