Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a4546c65ed27c9…

MALICIOUS

PDF

88.9 KB Created: 2021-02-25 09:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 50770d867e561935c3e5221fdc59680f SHA-1: 7531263170ed37a2018d3219a206065042ccc9ef SHA-256: 95a4546c65ed27c9f6bcb645fd9f3923c108a2a8ca577183513e10fc1b1719f2
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a 'summary' or 'award'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent for user deception.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://baarspo.ru/award?keyword=bodies+that+matter+butler+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452850/normal_6027bff380ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489716/normal_602c0b7c3e8b4.pdfIn PDF document text
    • http://fewomazojuxed.iblogger.org/49602163092.pdfIn PDF document text
    • http://bonifacy.site/chunky_platform_shoes_outfitkvtic.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/crossfit_training_guide_nutrition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_602cd966943a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_60136423ef6d6.pdfIn PDF document text
    • http://vitalia-transports.com/sony_action_cam_as20_accessorieso9ut3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376087/normal_5fc5982c2c502.pdfIn PDF document text
    • http://septiki-rf.website/aesthetic_clinic_business_planutl8s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470552/normal_60141761b9b40.pdfIn PDF document text
    • http://poopo.ru/98151804671ztmo6.pdfIn PDF document text
    • http://allfreebets.ru/bomototusi40hzp.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/bisute/ccie_wireless_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/technical_analysis_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/reporters_questions_crossword.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/r_c_c_ka_full_form.pdfIn PDF document text
    • http://vutagefen.epizy.com/wukovowonej.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/47470184822.pdfIn PDF document text
    • http://totolimosoranap.rf.gd/custom_rom_redmi_note_4_mtk.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/used_ford_mustang_gt_convertible_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/acrimony_full_movie_toxicwap.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_off000112be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BE 5132 bytes
SHA-256: 864f35a9075099bed98705278d8e4f0a86b35ddeb2490a7e328b9e99682452b0
font_01_sfnt_off00012437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12437 10392 bytes
SHA-256: 98498576adfd6a78a76b938ec58f24105c719c2ba7a39cb95e0cd286c859aa03
font_02_sfnt_off000147c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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