Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14cbae4950bcc33…

MALICIOUS

PDF

75.2 KB Created: 2021-03-04 07:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 507149777655182cc42afe0b29ad544b SHA-1: dc25787899db384ce965f77ed3379809d5936ae0 SHA-256: b14cbae4950bcc33de7d8a466addffea3b8c7576cef61e3961ce8054502384b7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to book search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wb?keyword=dog%20man%20books%20reading%20age PDF link annotation
    • https://cdn.sqhk.co/xuzuvazol/hjjaXtA/26299665307.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/biggjaz/lusolunawilokitoko.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/G0tYsjh/sunanususu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_600f04162237e.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/world_history_shorts_2_answer_key_europe_moves_toward_war.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366010/normal_5ffa9e55a8906.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/ihvEDii/34099993610.pdfIn PDF document text
    • http://fesabip.iblogger.org/9217652794.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480412/normal_600859919aa8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/94391162647.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/wanuvutuke.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/best_korean_mask_sheet_for_oily_skin.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/how_do_you_convert_fractions_into_decimals_without_a_calculator.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/cv_template_word_school_leaver.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/cdac_question_paper_2017.pdfIn PDF document text
    • http://bosovegiged.rf.gd/larobepokadunemod.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/59940771800.pdfIn PDF document text
    • http://dufobirufo.atwebpages.com/sharing_instagram_photo_on_facebook_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/amma_songs_free_masstamilan.pdfIn PDF document text
    • http://xuzatazuji.epizy.com/29532010127.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_off0000e94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 5316 bytes
SHA-256: 4cdfb7b175cd1b5d26f8a6ba66fd1b8fa28e725afa93ed2df453be60a2e023fe
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 10712 bytes
SHA-256: 164b2f664a161a520613aab0e35ed9357878a70b5b1b3ac5dfb1925272a4539a

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