Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd1b56a5feae3fc…

MALICIOUS

PDF

76.1 KB Created: 2021-06-13 19:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac1a99ecbd2e9a40bb4dc752a305a03f SHA-1: e2dccccc5d825b38f980a65a97311335ae978db2 SHA-256: fdd1b56a5feae3fc01491c1ecf9752ecba032290ffc2e45ec594b93ae94a3f1b
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a domain associated with song downloads, a common lure for phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for initial compromise.

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://dafemum.ru/123?utm_term=all+songs+telugu+2019
    • https://cdn-cms.f-static.net/uploads/4448121/normal_601d19bc9b9e9.pdf
    • https://jugoneworo.weebly.com/uploads/1/3/4/3/134307205/xiresikus_zezale_naxamuriwojo_gakeweginokip.pdf
    • https://cdn-cms.f-static.net/uploads/4427080/normal_6018a6a0007e0.pdf
    • https://katifakemu.weebly.com/uploads/1/3/1/3/131381151/1951819.pdf
    • https://cdn-cms.f-static.net/uploads/4383449/normal_605ac66e993de.pdf
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/2349630.pdf
    • https://cdn-cms.f-static.net/uploads/4446162/normal_60c564e981069.pdf
    • https://cdn-cms.f-static.net/uploads/4465905/normal_6023d9da1bcf6.pdf
    • https://judelewufajog.weebly.com/uploads/1/3/4/5/134516313/ce362cff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xafusigivu.pbworks.com/w/file/fetch/144663480/anveshi_jain_app_mod_apk_unlimited_money.pdf
    • https://uploads.strikinglycdn.com/files/a5fdb286-11bf-4918-8759-e039cc1526f5/fijixatodazupigoz.pdf
    • http://xejujaser.pbworks.com/f/zepujajokarud.pdf
    • http://wixugigir.pbworks.com/f/how_to_check_lic_maturity_value.pdf
    • http://wuxewuda.pbworks.com/w/file/fetch/144899328/230592614.pdf
    • http://zekodunu.pbworks.com/w/file/fetch/144467970/how_difficult_is_it_to_assemble_a_nordictrack_treadmill.pdf
    • http://namikikis.pbworks.com/w/file/fetch/144636537/how_long_prevailing_wage_determination_take_2020.pdf
    • http://xojifot.pbworks.com/f/dopotikixexot.pdf
    • http://xesimisejek.pbworks.com/w/file/fetch/144605469/desex.pdf
    • https://uploads.strikinglycdn.com/files/6c7188bd-bced-4a4b-9217-8529a2b861d5/56808080196.pdf
    • https://uploads.strikinglycdn.com/files/d244644c-c1c8-46da-b1ab-a955b2d2dfce/g_shock_g7900a-7.pdf
    • https://uploads.strikinglycdn.com/files/79c156f0-94a5-4f7d-bef4-4904f795307e/kindle_paperwhite_users_guide_4th_edition.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2b.bin
34a435d2f77a1a0de97f29071aa03a5d1d01b5581d146d23a0b02127a238694d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 5016 bytes
font_01_sfnt_off0000ff5b.bin
02b7376e81a699cf510c5e62e164c3e6e506a4aca3d88e69f1ad667d4ddae597		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 10812 bytes

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