Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4dfde4d20b3f37…

MALICIOUS

PDF

81.0 KB Created: 2021-05-25 17:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 218f7715e29fc07e6467d1699e25fd55 SHA-1: e7e5a11eee217b0d41348ee258d7dcf5feca232e SHA-256: cc4dfde4d20b3f37874cf1ebd0bb55b4ec957f27d6d182ca65818c7704871ed4
136 Risk Score

Malware Insights

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

The file is a PDF containing obfuscated text and a high-confidence ML classification indicating maliciousness. It includes an external URI pointing to a suspicious domain, suggesting a phishing or scam attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document may be part of a multi-stage attack involving password-protected archives.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/strik?utm_term=porque+el+desarrollo+organizacional+es+un+cambio+planeado
    • https://cdn-cms.f-static.net/uploads/4501804/normal_60126a911af0c.pdf
    • https://static.s123-cdn-static.com/uploads/4445334/normal_5ffb3e0cc1e56.pdf
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fe55463869c3.pdf
    • https://cdn-cms.f-static.net/uploads/4385847/normal_6043ea1a332fe.pdf
    • https://cdn-cms.f-static.net/uploads/4454425/normal_604d19f280083.pdf
    • https://cdn-cms.f-static.net/uploads/4484636/normal_600ae6dd936ae.pdf
    • https://cdn-cms.f-static.net/uploads/4446038/normal_606da7de665ba.pdf
    • https://static.s123-cdn-static.com/uploads/4485173/normal_5ff7129fd52f8.pdf
    • https://cdn-cms.f-static.net/uploads/4483842/normal_601dbc451a61a.pdf
    • https://cdn-cms.f-static.net/uploads/4401540/normal_602be2053a960.pdf
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5fee1d01e04e8.pdf
    • https://cdn-cms.f-static.net/uploads/4447098/normal_603eac0b35938.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jikopot/actualiser_formule_excel_vba.pdf
    • https://s3.amazonaws.com/laginekux/what_is_the_best_kenmore_washer_and_dryer.pdf
    • https://s3.amazonaws.com/dewutexorob/lozurosikegezedogokifarar.pdf
    • https://s3.amazonaws.com/bipovoromoj/fly_piano_sheet_music.pdf
    • https://s3.amazonaws.com/pezofut/metaganeni.pdf
    • https://s3.amazonaws.com/susonanezaj/mitigitemuwaruso.pdf
    • https://s3.amazonaws.com/pusixa/sonicwall_tz_205_manual.pdf
    • https://s3.amazonaws.com/mulerux/10978703566.pdf
    • https://s3.amazonaws.com/wavunot/66235086801.pdf
    • https://s3.amazonaws.com/getizar/is_emdr_effective_for_trauma.pdf
    • https://s3.amazonaws.com/vutame/xilolokezutunid.pdf
    • https://s3.amazonaws.com/dufekifaral/jutemedadiwarigin.pdf
    • https://s3.amazonaws.com/jivagajamav/coming_soon_html_template_free_w3layouts.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc3.bin
3838010dfe4061eb0f829b6cf76ab19e9dca6b4caad385bd680766ad9e166ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 5512 bytes
font_01_sfnt_off0000ff55.bin
058f18d88c88eb885b1d7cd7281979a132aa89d6cdf522b3feb5d75e5c6445fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 11736 bytes
font_02_sfnt_off000125a8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125A8 4324 bytes

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