Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d6da894fad112b…

MALICIOUS

PDF

61.3 KB Created: 2020-10-15 06:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 985ef33825a25a7256875633567248b9 SHA-1: 59d2a06039e8b2cac3849d447d573a2645da8603 SHA-256: 16d6da894fad112b60335e27a578226060300307af78b21fead72a6203b6da8d
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=resuscitation+council+guidelines+2020 In PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/zixekew.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/mezevoxinokimuwamibu.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/a8c5456bfbd.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/xusimob.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/297c0.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xujewonagamaxu.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.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/394380e1-36cb-4750-99c1-07eaea290e35/laraw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd66053-5d27-4f46-8068-735de22de24f/1780888001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fabeb6-81c3-4354-9cb4-961baa59a475/67359439823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/29740178969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1306/9205/files/cq_wpx_contest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b6906b-2a00-4d65-a771-49fd6cde8c1d/62745960723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197ad4cc-5302-4b75-a9c0-c05c547b5eae/15414906275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65362f52-3b0c-4c6f-ac6f-2456da3ef621/35045041140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a3b4efe-d34a-4527-afba-6f2078e69903/vafupenovavimitinatimawif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d81a93c-80c3-44f3-864f-e5c3637ae902/21392662675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/7551/9910/files/sharp_carousel_2_microwave_convection_oven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3023/6314/files/bimeradizupufo.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_off00008669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 5172 bytes
SHA-256: f48656d7912b105689668ca5638b22b16bac01936eb683e2bc8ff72e4bbe4b90
font_01_sfnt_off00009808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9808 10592 bytes
SHA-256: 103745e6a3f0f3387901a715fdb8f96f3adce4ccf4d43a4c4120ff04e65dbcf3
font_02_sfnt_off0000bba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA6 18540 bytes
SHA-256: 339ec73e5d31a8df7ccccf41b06797fe43b5dc39d9b58e7f8ba4e790dcaabdad
font_03_sfnt_off0000d8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34