Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6b535c557196f8…

MALICIOUS

PDF

78.4 KB Created: 2021-03-02 20:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c0c5f8a2d2c79c759a99b5172616d72d SHA-1: fea9f55d1609fe5efedca2dcc533ff119e7ca049 SHA-256: 2e6b535c557196f844d8606a0f12bb9ef48ccbedc2169750825aee5c2b356c8c
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URLs within a PDF, combined with the heuristic firings, suggests it is designed to lead the user to download further malicious content.

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://fokemale.ru/strik?utm_term=sap+system+security+guide+pdf+free+download PDF link annotation
    • http://ctuxuu.com/11313568261dkpr7.pdfIn PDF document text
    • http://vekvelo.ru/how_do_you_calculate_cohens_d_effect_size5jpgu.pdfIn PDF document text
    • http://itslm.fun/806261617622weap.pdfIn PDF document text
    • http://airbin.top/virgin_pulse_max_sign_inoeq95.pdfIn PDF document text
    • http://choosemadam.site/34882509202zqqxl.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/8hibhhk/mystic_messenger_jumin.pdfIn PDF document text
    • http://claire-irk.ru/sodegefijyr7.pdfIn PDF document text
    • http://wogigafulokeme.22web.org/letterhead_template_word_doc.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/kumasala/goxuwiwejuwasanuzuwig.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/sample_capital_expenditure_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/how_do_mind_maps_help_students.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/sapagafoperup.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/42503800124.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_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 5652 bytes
SHA-256: 2780ee67b5ebe968980e5092baac57927e0d31b55baad083809bbf26845fbb86
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 10360 bytes
SHA-256: 99e5c93ec8771515e96912d0ee9b18ab1d3f7c8868069eb8eda079462a7496ad
font_02_sfnt_off00011e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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