Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f27b3f93fea86a1…

MALICIOUS

PDF

78.7 KB Created: 2021-02-19 23:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f2ce0492ec9e4b95c1670bf0ffad5a96 SHA-1: f4680fa6de3854d183c2583ece587cb0a8afecb5 SHA-256: 4f27b3f93fea86a1de4597ac582cd767429b1477cb0d35ea11a63ee7edcce12b
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 for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a URL that appears to be a search result for a product. This indicates a likely phishing or malware distribution attempt, leveraging a common lure to trick users into clicking the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=bose+qc15+microphone+pc PDF link annotation
    • https://cdn.sqhk.co/liregagibago/cxhaHgc/paycell_musteri_hizmetleri_iletisim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415748/normal_5ffda7ad47223.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5fe5541cb9fe4.pdfIn PDF document text
    • http://tixshopclub.fun/cobra_29_lx_max_antenna_warningpf8ei.pdfIn PDF document text
    • http://sallehub.xyz/buffalo_nas_app_androiduppig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489586/normal_5fffbf8360f6c.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/KY4gjjf/logo_quiz_level_25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489976/normal_5fc6a6d76eef8.pdfIn PDF document text
    • http://differencecheats.net/xagexuraxipunklv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379844/normal_5ff622097989d.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/ijzjdQg/video_editor_app_for_pc_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5febda391826b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459926/normal_5ff4dd5739a41.pdfIn PDF document text
    • http://yourlivehelp.com/mini_retro_classic_game_console_built-_in_62075hit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5ff38982a658d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485434/normal_600a40b34aa92.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/bomupi/dejasenilapeweto.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/nespresso_vertuoline_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/nebisutojula.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/catheter-_associated_urinary_tract_infection_idsa_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/pixubikikidipepap.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_off0000e94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 4992 bytes
SHA-256: b1252287f5e0c016bf202e6cf1078330d309ae6fcd2f66ba00d0b5bf8d92d5d0
font_01_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 10988 bytes
SHA-256: 8c5b7fec0f9e06bfd242cfe9e03aed03e4641d00806690e99a8e8f630ae1d1f7
font_02_sfnt_off00011f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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