Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d10af41ca454967…

MALICIOUS

PDF

74.1 KB Created: 2021-02-07 01:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dfefae01ae41eb4a1ab021c5734e4e41 SHA-1: 4ac69bc51a0c01433d5ef4411e3ec50d5807d754 SHA-256: 5d10af41ca454967ab3f728a43b0bb0870d50a1ef53468fbe7f02f0f72957a35
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL and numerous other URLs within the document suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection profile indicate the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=emerald+city+wizard+of+oz PDF link annotation
    • http://gijokamamijole.iblogger.org/xumanuxojovakafivixofob.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/4aL2eqq/hex_color_picker_white.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/iehhiij/jovamex.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/bCu4hcS/pevozulinowovekopi.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/wQjemYU/tudenedizakukulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5fe7616d83544.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/ighehgA/xejuzigexokepesetedaf.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/8VhaI3J/26951154613.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/hfrwmNo/minecraft_guide_to_survival_book_big_w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_5ffa70c035b45.pdfIn PDF document text
    • https://cdn.sqhk.co/sinupupuzaxa/uZLgjhj/dinosaur_game_deadly_dinosaur_hunter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_601b442448662.pdfIn PDF document text
    • https://cdn.sqhk.co/metevetufi/C7laZji/gold_and_silver_prices_charts_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/bjdtjOJ/usa_facts_coronavirus.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/ihhihgw/guess_tamil_movie_name_with_answer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wozowuledij/baudelaire_pequeos_poemas_en_prosa.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/bunagimajobidaj.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/addition_problem_solving_worksheets_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/chevrolet_suburban_2007_owners_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DB 4872 bytes
SHA-256: 4a1630a3ddf1844eeb7a408658bf7d6df7db4ba7b0258d805767da01d9521aa8
font_01_sfnt_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 11304 bytes
SHA-256: 0ac65f5c9b3311ccb2f829855efa1c70fdcec3d58e483ff482f856ebf0a8412d
font_02_sfnt_off00010d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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