Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f94c05b319bdc3…

MALICIOUS

PDF

48.6 KB Created: 2020-10-05 13:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 39f8b857f6ca7a615f438c6874e08d4b SHA-1: a78f13da7bee57dffb92a9af12a3042e94fd1b0c SHA-256: 33f94c05b319bdc32e9b171b22abd5b299041aa133a5c05d5876dd79afeb6f53
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=glass+fibre+reinforced+concrete+pdf+download In PDF document text
    • http://files.wesleyofyakima.org/uploads/1/3/0/7/130739755/xugafeguvako_wutesevok_wemujixijar.pdfIn PDF document text
    • http://files.gingerfitspo.com/uploads/1/3/1/8/131858287/wujelep-rijiw.pdfIn PDF document text
    • http://saxoda.petrichorartanddesign.com/uploads/1/3/1/6/131606858/8552356.pdfIn PDF document text
    • http://pudikofo.venusevanswinters.com/uploads/1/3/2/6/132681947/niwiji_vibizuwivemewow_kilix_dakarerup.pdfIn PDF document text
    • http://tikugegu.ollilove2.com/uploads/1/3/0/7/130739830/3653269.pdfIn PDF document text
    • http://files.middleclassempowermentzone.org/uploads/1/3/1/3/131383018/felixogotolako-xawavorukate-wizijoboro.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/7eba862e-b000-483e-9959-0835a7390450/66217241908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b958dad-5a26-4bdd-a349-49ed89c121cf/gitujewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad96f9ea-7130-4c92-b66e-af84fdec3a35/limekuxagagebireworetabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3af4768-5fbc-4fe2-9695-67ec88705068/97240818646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d35e8b5f-a7b0-4c91-96f8-f49236ce64df/momufeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3149/3784/files/povuzaralamiwegosasonujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9197/4557/files/persona_4_yukiko_deadline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/zudewiweferanenedo.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_off0000761f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761F 1604 bytes
SHA-256: ee81cab254ac85aeb2a8d6fe0e230f9e5d951218a9efd47771ff3bdca439f7a5
font_01_sfnt_off00007e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E46 5412 bytes
SHA-256: 08aa7e35c2157293f733f10fb0ccbdf2d6109524695c4b1c9cd6c9b94f6e6dcd
font_02_sfnt_off000090c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90C8 10688 bytes
SHA-256: 4f515a6358154b381fed5cbbce4843465cf36b54a6b35b30b636af2a0a0ee18d