Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2001f000f5b0d89…

MALICIOUS

PDF

71.3 KB Created: 2020-12-10 16:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a86dd5314a4d44d3c88b3c8c1ccb990e SHA-1: 1e63fe57b68818b6e2fa56e0330fe8c3b4225879 SHA-256: a2001f000f5b0d89e0acda0562e81e0a668e55b4215a63d058395722c27a1138
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a system restore utility. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffking.ru/123?utm_term=full+system+restore+windows+xp In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe18d99d7936484056bbac/1606293721095/binomial_coefficient_calculator.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc007006609fd0ee78c7004/t/5fc13b313c6ccf69f38ad460/1606499124255/50154227356.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10d80e9fc3622d522f76c/t/5fc84f6ae101942bf76c367b/1606963050261/voice_input_keyboard_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed1560f2895dc1e7fe11/t/5fc15cddf8cdb769c6169373/1606507742256/30084074482.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c5aef7cf8c75404c2941/t/5fcea14f06785e60cffcd2d2/1607377235351/assistant_to_the_regional_manager_board_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6db42504bb4653ce19d0c/t/5fcdaafba87f9f1b19f6b937/1607314172608/homescapes_cheats_coins_and_stars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a2bf02-fada-4420-911f-ba542d6b3533/steve_harvey_wiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc006d0104edf1d777bfbd4/t/5fc34f17a97599144e6203b7/1606635287856/kukubesizegodewaf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffcc36609fd0ee78c2f31/t/5fc1025a9ee0f32b87769d8a/1606484570565/81685529973.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc70ec7a4d75e5252f2a30b/t/5fd17268b0f0f842d79b6672/1607561833352/knife_sharpening_wheels_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc7891b-2d6f-425a-a99f-1cb9bbef5a71/vexomewefazobetus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd008c14dfd36feeb1b6e/t/5fc0da24a97599144e171b21/1606474277403/sanupukomisadimed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ee8c24b06a7eb3194721/t/5fd13f245a35a86a4753d504/1607548717539/correct_word_for_hospital_room.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE39 4996 bytes
SHA-256: d26e973df36344cd3463137ef943da621cde7392a28a7c33748df0ab66f3f3d4
font_01_sfnt_off0000df36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 10272 bytes
SHA-256: 78d69bc8a51eb061c53835f301ad9f4b2c45b6ebdebfc4fd465eccdc189c8889
font_02_sfnt_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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