Malicious PDF — malware analysis report

Static analysis result for SHA-256 9218f689e4a874e9…

MALICIOUS

PDF

72.3 KB Created: 2021-03-20 03:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f5d871a34f623c461a8a279940a3d289 SHA-1: 149c0b43e0fc086114e1ccd09ca954a4f5557236 SHA-256: 9218f689e4a874e9ff44147b383281f5d714b47465af3af4480cf990184deb86
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=the+pharmacy+word+whizzle+answers PDF link annotation
    • http://vukufitu.mywebcommunity.org/atlanta_nights.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/14517995596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_601ebc8dc9573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417419/normal_5fc9d8a85bbba.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/46980516965.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/organelos_celulares_y_sus_funciones.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_6044d8020ce23.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/delonghi_14_fin_oil_heater_price.pdfIn PDF document text
    • http://bewudewumit.sportsontheweb.net/red_blood_cells_function.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_60265b86406b5.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/1249fb01-cc47-41ef-8e83-2bf597d03194/jopav.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_b97de0cffb91429a9ded3ece83901c2c.pdf?index=trueIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_d7d9d1527583408aa8b0cd9d41768f18.pdf?index=trueIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_cdd2d68882724f278baf324d74459b4c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c08456-949f-4e2d-8049-5392ee6745bb/nuporedanesukuwugafaduru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6da9f0-cab2-4578-b3c3-07abae18a87f/game_of_life_conway_gif.pdfIn PDF document text
    • http://lurolubudoruk.onlinewebshop.net/construction_company_profile_dubai.pdfIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_db51ec71f32f4c348df50be04f0c1570.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_1aa95bca7a834451b905273481ff465f.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_9e512461b0114f2f8eb9354075280670.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_9c8337a09b9b4690b15d975ea8f5622b.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_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 5508 bytes
SHA-256: 21e9e357eb7141a5d5540cf2d036837cd60b8e9e87596eb31f344bbded119b9b
font_01_sfnt_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 11320 bytes
SHA-256: d90ba74aef27881579f0e1e21141254d064b968a0fc9c428eaaac143e25cbdef

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