Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b909724f2819fd…

MALICIOUS

PDF

69.7 KB Created: 2021-02-19 07:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e00481583a08fee50ca8c5ef2553ebe7 SHA-1: 528b7380052b7ff418d1a1ad0c6517962ad48739 SHA-256: f8b909724f2819fd9a075bf40e5a2d37a5ebc92466b11f54933ae3ab2f0a01eb
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to contain search terms related to recipes, suggesting a phishing lure to a malicious site. No scripts were extracted, but the presence of external URIs and high ML confidence indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=black+and+decker+bread+maker+recipes+gluten+free PDF link annotation
    • http://dedarijaluwonu.22web.org/aow3_warlord_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_602d63a29111e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_5fd399e981c49.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/fOBijt8/whatsapp_business_mod_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/dihhzjj/social_media_marketing_specialist_jobs_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/ZLHcXjf/coffin_shaped_nails_medium.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/aibgcKN/bokiboladowederefix.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/ic1nphc/fedivusoxox.pdfIn PDF document text
    • http://kivedunorujuw.66ghz.com/bcbs_of_illinois_aba_forms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/5e_valor_bard_guide.pdfIn PDF document text
    • http://vetovolixexa.epizy.com/components_of_blood_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/revenue_management.pdfIn PDF document text
    • http://sowiveporumege.epizy.com/69206065865.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_off0000d05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05C 5728 bytes
SHA-256: 58f0e01d3d2e48bb3e0c6b9ae4751468f6425bcd55a7b6cde6dc06dfc05bb7f5
font_01_sfnt_off0000e3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C4 11084 bytes
SHA-256: 85672704515046ffef327f1bdc20cdedec3f3989ab9c91454cd90271ab569a32