Malicious PDF — malware analysis report

Static analysis result for SHA-256 debadf637391c10a…

MALICIOUS

PDF

73.8 KB Created: 2021-04-27 00:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2922f79da64e0ef8047d998cca940e31 SHA-1: 5d5a75a6e495c8eeb1f19ebaefdd05dc2f16be88 SHA-256: debadf637391c10a4804d766c743ebde7edc6833e4346fd3606a308618725dfd
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 0.9993

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://kuzutuzo.ru/strik?utm_term=ok+driver%2527s+practice+test PDF link annotation
    • http://leafester.online/how_to_use_kobalt_sliding_miter_sawmme3r.pdfIn PDF document text
    • https://cdn.sqhk.co/sifilefu/c3Z3jcO/tags_for_social_likes_instagram_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/sumefixes/bkagBhd/fosekutimo.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/zuwarulabebetogegegi83ofx.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/85459362514ukqh4.pdfIn PDF document text
    • http://winfreeiphone.xyz/tufirumojalisigokfmsh5.pdfIn PDF document text
    • http://picply.ru/administracion_de_medicamentos_pediatriagfk9l.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/hc7bKgj/71932670888.pdfIn PDF document text
    • http://geesecam.com/my_rotten_redheaded_older_brother_personal_narrativebjb92.pdfIn PDF document text
    • http://namelesssouth.xyz/mepabumigutuo2m.pdfIn PDF document text
    • http://sunmarkt.ru/24660728766hzm5i.pdfIn PDF document text
    • http://urolog.xyz/mimujxmu6u.pdfIn PDF document text
    • http://life-news.tech/origami_diagrams_onlineurpse.pdfIn PDF document text
    • http://copyrighthelp.info/alto_s_adventure_piano_sheet_musicgjxlw.pdfIn PDF document text
    • http://pubguckazan.com/krld_1080_traffic_report4c2cv.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/5b2cf80b-2b96-439a-a1f9-f16b0ab49b69/22843698371.pdfIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_39c0222880d74cebb308e44e3117faf3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/10332bee-6ae5-40e4-9144-48e12c0324da/taxidukikufaj.pdfIn PDF document text
    • https://f8206d31-21c4-4aef-9da9-e4259ded718a.filesusr.com/ugd/c2bdac_691416d8403c4ae8a4179510a0640f40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f8fe45-ae54-45ff-bd76-94cf2ebd6c32/briggs_myers_types_percentages.pdfIn PDF document text
    • https://a29d81ee-e589-4368-99bd-4e0be04eb4c0.filesusr.com/ugd/a89e6e_fb374758b5c341daa189a663ccad751c.pdf?index=trueIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_86a2b939866a41e8a181f0dd986d3da9.pdf?index=trueIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_3429ccb37a584b60bde8a3ae22cc3af7.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_off0000e25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25E 5220 bytes
SHA-256: 033a3f6cb5188bb95ab40d0c027d6b51606feaef49748585c43e7f7750474835
font_01_sfnt_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 11444 bytes
SHA-256: 00f9ad8949dae39def2a59a73c41b01559a5bb75d7f834e3e4519d9a3c6e6559

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