Malicious PDF — malware analysis report

Static analysis result for SHA-256 e839ca1ab819fb34…

MALICIOUS

PDF

78.8 KB Created: 2020-12-15 12:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 74fd05a2435ac6357720a7707ad182dd SHA-1: f72240b05405c5d524849629ddd36df57c12309a SHA-256: e839ca1ab819fb347e2142e589971514a36bd862adb6575b6d1ef2aab6e9ca0f
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://cctraff.ru/123?utm_term=necchi+supernova+julia+manual'. This indicates the document's primary purpose is to lure users to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/123?utm_term=necchi+supernova+julia+manual In 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/5fc1a7ea16f6d44b07c4161b/t/5fc4ebc5f3de5e49b5ffa998/1606740933394/prelude_manual_tensioner_conversion.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/lots_and_lots_of_letter_tracing_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941363f4-a834-4128-8876-15e940dc2174/3020544095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43008adc-31ec-46ce-90b9-d3b91ed11188/zakat.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/video_maker_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/534a1a8b-a9a8-4f9d-9319-bdbe21d03b79/37169485712.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe06f4bc819f1cf49f7a66/1606289141238/unix_shell_scripting_by_yashwant_kanetkar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1b7fe9-56a0-4151-87ad-a8444f6b370a/27342615110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c223798-d78a-4acb-9528-0ad8a4937a2e/34630151194.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/extreme_car_driving_simulator_hacked_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf55eb08845d0924815e0f/1606374895029/xizofawawoxedorivexazakip.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/24251026970.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5558a405d5340f34720b6/t/5fce06bd920f47545bb96b22/1607337662521/1203984358.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc0e85518e72e5fdbf88faa/1606477910203/la_quinta_omaha_104th.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72F 5280 bytes
SHA-256: c4fade4a61fce2e93d7d8829f5d3d85d4101921e7082b55ab3a0264a3ec37d76
font_01_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000f193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 10292 bytes
SHA-256: 8ba5fd2e57845f07e41b0df977e4d30eb9bb15954feb2498bb7651b4d5cb9b7a
font_03_sfnt_off0001150e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150E 17504 bytes
SHA-256: 0387bb648b3930f593af4b298b7ebfed5a01aeac11a28a8dc1b03895237ceb51

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