Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e9094cf2bf4cd7…

MALICIOUS

PDF

68.8 KB Created: 2021-03-15 06:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 72566a3d5fd65f85d76b09729e8bf764 SHA-1: 11a3e7f74abd43533112ba56c394c29b57c6c58a SHA-256: 87e9094cf2bf4cd72331c7aea394f2eed99c7e0668e1dc96316c447706c2b798
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL designed to mimic a search result, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=boyd+christian+school+facebook+page PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485929/normal_6023f47c9c405.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/VhgYkk6/bakipovifujufubo.pdfIn PDF document text
    • https://cdn.sqhk.co/gifalaminika/hdyK8ib/timofatekojositofodesila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455405/normal_60497cb7bce0f.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/Fojagib/28772023132.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379722/normal_5ff9b462956de.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/jbtjbk6/zusorivoxinamigamuzemunon.pdfIn PDF document text
    • https://cdn.sqhk.co/disanefamu/yKgjUhf/85315217369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407087/normal_604358d7022f4.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/evp2lhc/muxuxavazexej.pdfIn PDF document text
    • https://cdn.sqhk.co/bikulatitaxe/qgewjc6/69764295098.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/calculus_of_variations_dover_books_on_mathematics.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/92834386464.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/jmo03cc/retro_game_gear_emulator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/66af7b2b-4a3c-4c0a-b6c1-aa67549e6315/surawuxukuwovito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd378a01-98f4-4360-acd9-7760690261da/20135891095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab9e84f-c61e-47ca-b6f4-cd52c3e06812/uncle_iroh_pai_sho_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5fbc9b-688f-4182-8fb1-85e64651eb04/what_is_the_best_undercounter_ice_maker_for_home_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6b916a-6e53-4bab-9ed0-05c9bf884832/experiments_in_physical_chemistry_shoemaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5065fd11-5c9b-4ba5-8e21-9cf315afd209/kozako.pdfIn PDF document text
    • http://zepuwiz.atwebpages.com/metric_length_conversion.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_off0000cee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE3 5772 bytes
SHA-256: f520706a293fb340011d505a5ebb12b78ff21545ec1cdd49860372c0fc9b3782
font_01_sfnt_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 10788 bytes
SHA-256: 9f66025c1a5b600ef0c15973517723e887d379bcec4080e46157db02ad4c2755

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