Malicious PDF — malware analysis report

Static analysis result for SHA-256 398fd4c39a6bf2f9…

MALICIOUS

PDF

66.9 KB Created: 2020-12-21 19:37:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 129a9d411e00f3bed5c6743351c5b9c9 SHA-1: 7de23d7d13dd256b79b59a7de05ce0dbafd22af7 SHA-256: 398fd4c39a6bf2f9da957cf8003dc076ecd43b0cb75803384115a48cfc72317d
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://traffmen.ru/aws?utm_term=bolton+wanderers+former+managers'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment.

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://traffmen.ru/aws?utm_term=bolton+wanderers+former+managers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4464319/normal_5fb760e48e2b9.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/c83b0e8a-67ae-4185-8a1d-dba6f9b58765/47888733398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c512d0cb-84e5-47c8-8562-d4118dedbd31/12188395418.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/android_bottomsheetdialogfragment_full_screen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc541af24b06a7eb31c2be5/t/5fd68f6b9264095525da8312/1607896948631/51112795524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6217dc07-a6f2-4b93-a79d-dbb7c968a85c/52860621733.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d766a3bf4b14aba8e616/t/5fc137f62dd96f59181baa6c/1606498294420/ancient_world_history_patterns_of_interaction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64e4796-2775-4318-9df3-636660d6d965/acad_menu_missing.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27d7511f6a419848fbf13/t/5fcd459cc00f007ceaf56590/1607288221538/sojikoveziravabetix.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/pazibunajesotip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba56400-55a2-46f4-bcbf-a7d4a12e808a/the_jesuit_guide_to_almost_everything_by_james_martin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc117cc3398ff75152f2ade/t/5fc3f701173fb5383b1e3a61/1606678274620/kingo_apk_tv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc656352cf09257bd907783/t/5fcc738e74a40730fb91bfec/1607234449649/24107712804.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_off0000c686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC686 5368 bytes
SHA-256: bd8b9bc3f81e1d83bb4b902f875265fac3b2e1b314facf3a125675a18e2fd707
font_01_sfnt_off0000d8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C6 11184 bytes
SHA-256: 2fa8b8c139b268e9c9532c3fc43dec0ba7548526a92b335e0493345092ac1cc4

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