Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf5b671d73ea21e…

MALICIOUS

PDF

55.2 KB Created: 2020-11-01 17:34:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e981e47dd78ab2a6bba3b6b4dd7c4814 SHA-1: 9624b216e225c64461282fc3b474a46c9a3a621c SHA-256: 9cf5b671d73ea21e765e710fa23c07e137ff944fe11ce5bbaf038e4d01984941
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ttraff.cc/123?keyword=build+battle+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f91548c97d1a.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/1110981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f9c6866284d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f88b7f1d1ae6.pdfIn PDF document text
    • https://zujanotoze.weebly.com/uploads/1/3/4/4/134476942/busarezaz_motokatugosa.pdfIn 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://uploads.strikinglycdn.com/files/cd28eaa3-a320-4f66-844d-bc27737b7bd9/rigiribafuzusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45509d16-219b-4683-9110-ebbb1396b13b/61557308269.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/konitodikado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2412/9437/files/my_singing_monsters_composer_apk_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b79975-274f-4387-9613-96e8e873a05c/bonne_annee_by_jean_pierre_benoit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d82c64-022f-4653-8e6f-9a67f7aff71d/49967045154.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/79082948426.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009389.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9389 25720 bytes
SHA-256: 0fd666c62526d6d04b3ed0692165882ada2935d1632ad3f57f5c6652fa8ebed3
font_00_sfnt_off000057af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57AF 4596 bytes
SHA-256: d049e73396cb581b18b634b13d0ee81d1e19e8996aef643c48d4f7b1e079b545
font_01_sfnt_off00006752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6752 13996 bytes
SHA-256: 424e34b95f591ec8002ba948829f5e6a6312f389dc27d229cb6d3f3dff59e61e
font_03_sfnt_off0000c21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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