Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdc31dd7c20056e…

MALICIOUS

PDF

70.7 KB Created: 2020-10-15 01:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: faef4b1d88f494aae287d03775ac17c0 SHA-1: 94e4e6f4da14d2199a97e9c4bab2fa0d7649b702 SHA-256: 0bdc31dd7c20056e3df13896bdd1027c482a9f82dea69a187d9c43eebfb5a7b4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?keyword=problemas+resueltos+ecuaciones+de+primer+grado+pdf In PDF document text
    • https://site-1041600.mozfiles.com/files/1041600/24520737284.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/55957032081.pdfIn PDF document text
    • https://site-1039634.mozfiles.com/files/1039634/memababutisoluguvojugogib.pdfIn PDF document text
    • https://site-1038835.mozfiles.com/files/1038835/fugokaf.pdfIn PDF document text
    • https://site-1040432.mozfiles.com/files/1040432/gizoriruvewoxiwaxugup.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/zudoxazimepulige.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/154f826c39fded.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f876b595a6f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f870fee76d31.pdfIn PDF document text
    • https://site-1039950.mozfiles.com/files/1039950/xojinifaropemeboz.pdfIn PDF document text
    • https://site-1040982.mozfiles.com/files/1040982/gunezefibozunozugi.pdfIn PDF document text
    • https://site-1044159.mozfiles.com/files/1044159/48896352047.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/zaramevasitu_zexazivofulovap_tuper.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/butujekinol.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://cdn.shopify.com/s/files/1/0480/1803/0751/files/tidolomudakunet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/universal_sewing_machine_extension_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7937/3478/files/20722972579.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_off0000bdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEB 5500 bytes
SHA-256: bab2dcb82d2386ef0c203eeb8696e1d21bd8e92310e4b9c7af2a0c1819778b09
font_01_sfnt_off0000d079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD079 15168 bytes
SHA-256: ec27316ecbaad26623ee6b6cbccf54aec8f5bd241585b90298ac8572e60c7f6e
font_02_sfnt_off0000ff31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF31 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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