Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8dc18d06e9b4b4…

MALICIOUS

PDF

76.6 KB Created: 2021-04-08 08:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e031f0cfc735314333369dbeba4d6b98 SHA-1: 0ac4b3ae991ed3b450655877469e0f0cc85f8b80 SHA-256: aa8dc18d06e9b4b473bf9c79e032fbbce9fff2fde93e673128c86593a6b17995
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for downloading content. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest it may leverage PDF vulnerabilities or embedded JavaScript to redirect the user to a malicious site, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=criminology+books+in+urdu+pdf+free+download PDF link annotation
    • http://film123watch.com/jojodezivulenazakutajuxasl7zi.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/chukyu_kara_manabu_nihongo_teacher_manualsnymi.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/9N1y8IA/divetupozeripobi.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/gijj3Bc/dress-_up_games_fashion_fun_online_agame._com.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/6433588.pdfIn PDF document text
    • https://gogijufiwadika.weebly.com/uploads/1/3/4/5/134581681/nomolalusopibukewuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/dhjrgdF/25326231366.pdfIn PDF document text
    • https://cdn.sqhk.co/kojivitew/gA0ihCj/puxutelobujimepi.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/wemufu.pdfIn PDF document text
    • https://cdn.sqhk.co/dogojaseziwo/SHgi5ge/best_free_software_for_group_video_call.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerowegujij.onlinewebshop.net/96800625776.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/75955318938.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/62382286785.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/dorofubevavewibiwipanonu.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/constructing_congruent_angles_worksheet.pdfIn PDF document text
    • http://todifisafi.atwebpages.com/developing_basic_digital_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/cognitive_behavioral_therapy_worksheets.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/96055750709.pdfIn PDF document text
    • http://namezenidel.onlinewebshop.net/kamuzukarovupisas.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_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 5664 bytes
SHA-256: 16840fb06d50d07b8d07e02f41020fce9979a0cac11882ec449347748cdfba31
font_01_sfnt_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 10892 bytes
SHA-256: 758a290426f43d6aa2073bea140b7f88b9e9c4a78c3d830ee2d72010475a0148

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