Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cebad33f19ef26c…

MALICIOUS

PDF

72.1 KB Created: 2020-12-18 23:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 77ec92617ec13f66f749773cbd56460e SHA-1: b82c88d4347e06ecfe7132908c7d3336fec946e8 SHA-256: 9cebad33f19ef26c7e98cd78d052e50fd2b720b4051cf2551559d7263c28cac4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=cathode+ray+experiment+led+to+the+discovery+of'. This indicates the document's primary purpose is to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=cathode+ray+experiment+led+to+the+discovery+of In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f9e6c800d31a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_5fd9a18dd6fee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6bf4244e997374a281700/t/5fd64eac13a48350e80f6c6e/1607880365589/adivasi_new_song_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a737a0b-d224-4f0d-9a20-1d6dc3e25e04/netspoof_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d96481-6d9c-402a-ae84-5db8d934a924/47968491904.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc378082bbd74065816d6b5/t/5fc6bde89dfc2a404507976a/1606860264271/nedapulibipelepimezig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c5d99c-dba4-4f4c-b5db-aecfed7c73a6/zatibarugufomibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e75faa2-a587-43c0-8016-97e869ebad85/kobaxagekawofipidon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eadc702-ac31-4550-b786-a2e999806d96/82179459872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4580ab8c-aecd-4ceb-ac6a-024b0a45c3bc/kia_service_manuals_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0f60fa04221c71e82eaf/1606291297933/taken_3_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf1071de407d5e35ccfb05/t/5fd1ebb59a9e5443ac7d84a1/1607592885623/investing._com_stocks_finance_markets_news_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a52c3fa-0b41-4973-816c-6ea1ea3f8323/wow_dragon_isles_lore.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_off0000d9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EC 5532 bytes
SHA-256: b8c3fbb882e3d90f1eff03b434b8125f5bc53cc741de33ca58b62479ceb183e0
font_01_sfnt_off0000eca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA1 11436 bytes
SHA-256: 99ff6954a60f6ec61ce6c51c05ac8a7b0da176e49a519f15cb2c4f2a0d0b5557

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