Malicious PDF — malware analysis report

Static analysis result for SHA-256 d638a41675990a23…

MALICIOUS

PDF

78.5 KB Created: 2021-05-12 23:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 00d2878733379abd2b6bf765297527b2 SHA-1: 127962aa6c513a844d93c47ffcd85d866269dfc8 SHA-256: d638a41675990a238e21ea5ab47dade563f99fff118cfec067dc0519f8a2132b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for a common query, likely to trick users into visiting a malicious site. ClamAV and ML classifiers strongly indicate maliciousness, and the PDF_URI heuristic confirms the presence of an external URI. No scripts were extracted, but the overall structure and embedded URL point to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=how+many+calories+in+1+cup+of+sweet+potato+souffle PDF link annotation
    • http://koponegigat.medianewsonline.com/yaesu_ft-2900r_operating_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/avN5mha/throne_room_star_wars_scene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_604f2be575b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5fe7e7f5a5c43.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/rimulimejumewaxubagawixi.pdfIn PDF document text
    • http://wide-mean.top/borizawanumiwimujalunj6nig.pdfIn PDF document text
    • https://cdn.sqhk.co/mudebijutene/hhieC3J/94283561734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_60102162f1c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_602865a78c178.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/6vgiHgi/53528558828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_604467af3b7cd.pdfIn PDF document text
    • http://slimerecipe.org/doteruxowedegidojumev20iwk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litorow.myartsonline.com/blood_relation_for_bank_po.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/bonetrousle_remix_free.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/10854848870.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/tijedezidubarilana.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/fractal_fx8_review.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/example_of_formal_and_informal_letter.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_49fc657b63f149028deefce6d2e6ecef.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_4c8cbe8f09384638923166c1a22caedb.pdf?index=trueIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_087d88c3115a43dab6c775fb47440d78.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_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 5368 bytes
SHA-256: 9f89fee55bc0d2a0c35b81bd0a72b906419f0975e7a9b15c12394ad5b8e84bc9
font_01_sfnt_off0001055f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 11476 bytes
SHA-256: 6d5f143e89280232a740b76196fafd78a2e07e9009e0569134da59ac61aa9b3a

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