Malicious PDF — malware analysis report

Static analysis result for SHA-256 23523257344eead7…

MALICIOUS

PDF

68.5 KB Created: 2020-11-17 20:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 91e040c25bfd00a2b699bf8fe7ace6bb SHA-1: 993aa5f79ee313555c8cb82fc0a9f320176ca42c SHA-256: 23523257344eead7cbd1eb745e2fa03ef7fc17003c0212877efba426446ec365
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that, when clicked, leads to infrastructure associated with phishing and malware distribution. The document body, though heavily obfuscated, contains text related to 'Freedom apk download free for android uptodown', suggesting a lure for users seeking software. The ML classifier and ClamAV detection strongly indicate 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/123?utm_term=freedom+apk+download+free+for+android+uptodown In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f925803a522b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_5fa06b00cd03b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422137/normal_5f99733fe296c.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/0b9cdcda-12b6-4fef-9e54-2e3e08b9e6dd/40916768597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114b218b-eff4-47b4-aac3-2fbbfbe936a6/yahoo_finance_portfolio_slca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/481f6fbf-10b1-4e6e-a966-a0c4909b4bb3/albuquerque_white_pages_addresses_directory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a331975-f791-4a79-bcac-00f7dc6418b7/43793557943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aeb6512-1ee5-4796-b7fd-ac23e2d4e0fd/partes_de_la_celula_humana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45b657a-575c-4a2b-8c29-2dbc496e418d/jamibotadobodakal.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/6138113938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f212a50b-caed-4781-9d2c-a1099f581720/legal_seafood_hingham_ma_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02415bc-83d3-46ba-8725-ae655decd362/cross_my_heart_chords_george_strait_no_capo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50640ff8-4f79-48b3-9ab0-6305a77792d1/74920153490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1953f7c7-c8c9-45f6-8561-c6ea880b4898/dagap.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_off0000cf51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF51 5120 bytes
SHA-256: 97ab1b6e025a053d125594fef5245d1ce05e592299bd9ced0de8eb06f6ccb5ec
font_01_sfnt_off0000e0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BE 10588 bytes
SHA-256: e9fa5ba99dcf11bf8cf1cfb1db73792d4e8509247df229dedbecfd5200d24098

Open this report in the interactive analyzer, or submit your own file for analysis.