Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f395a0bc0970d0d…

MALICIOUS

PDF

77.4 KB Created: 2021-02-28 17:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ab8ebc111f040dcd5fdb93c6a0a5cc98 SHA-1: e1febdb7a0f0bac5647d25244de1974df2c43076 SHA-256: 6f395a0bc0970d0d206971bcd435d9a53675a28da63f683f05d75b9a22767840
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URI points to a URL that appears to be a lure for a book download, likely to redirect users to a malicious site. While no scripts were explicitly extracted, the PDF structure and URI suggest it's designed to facilitate initial access via spearphishing, potentially leading to further exploitation.

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://gimoguvi.ru/wb?keyword=como%20ganar%20amigos%20e%20influir%20en%20las%20personas%20libro%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386849/normal_6004b2454e487.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/como_hacer_una_hoja_de_vida_sencilla_2019.pdfIn PDF document text
    • http://dajexori.mypressonline.com/who_are_the_best_aa_speakers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426410/normal_5fedb916745ff.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/how_to_acrylic_paint_galaxy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448551/normal_5fefc628df04d.pdfIn PDF document text
    • http://manovina.mypressonline.com/50804761715.pdfIn PDF document text
    • http://nivawegokex.22web.org/code_course_4_stage_10_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ff56dcbee7a7.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/defene.pdfIn PDF document text
    • http://lemiritafuwab.22web.org/big_little_lies_season_3_episode_4_recap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/dometic_9200_power_awning_parts_diagram.pdfIn PDF document text
    • http://zaveravezujob.epizy.com/xarunawotuziriguga.pdfIn PDF document text
    • http://tolerikaduvutef.rf.gd/manual_de_bacteriologia_veterinaria.pdfIn PDF document text
    • http://venukaluxe.epizy.com/ireport_windows_installer_5._6._0.pdfIn PDF document text
    • http://nivewurunowu.rf.gd/minecraft_map_maker.pdfIn PDF document text
    • http://mesesoriran.epizy.com/texas_workforce_solutions_child_care_forms.pdfIn PDF document text
    • http://lunijikujapike.epizy.com/97192273829.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_off0000df34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 5404 bytes
SHA-256: cc4a016423cc4ba92768e2346c8a57a92596497940ad65c90edd7fa11189e3a4
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 5100 bytes
SHA-256: 8b00a1276157459a4c21f55e2557cf540ae4f296d8954ebc684e188602a6703d
font_02_sfnt_off0000ff4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 11932 bytes
SHA-256: a0a37ab6bff331200cfeeafb03471d4215ff0247cba3695039a73952cbcee2f2

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