Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8de3cae9515512…

MALICIOUS

PDF

43.4 KB Created: 2020-11-01 11:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d43bf49dc28bbaf4e1347c4c6f44b846 SHA-1: d1abd87425977204084575a92911c8216163d283 SHA-256: db8de3cae95155120f4e3416bc177b23288db4b59978c180c35d413b8a257bee
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://cctraff.ru/aws?keyword=ways+of+the+world+textbook+pdf+2016 In PDF document text
    • https://lefoxidegej.weebly.com/uploads/1/3/4/5/134526886/5231567.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/6709908.pdfIn PDF document text
    • https://rawofaweka.weebly.com/uploads/1/3/0/7/130775842/8485388.pdfIn PDF document text
    • https://bodadesoka.weebly.com/uploads/1/3/4/2/134234706/xixuparabejufun.pdfIn PDF document text
    • https://xajoxivanuxus.weebly.com/uploads/1/3/4/4/134432241/5216336.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/843027.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006919.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006919.bin)
    • https://uploads.strikinglycdn.com/files/040e4fde-3afc-4b3d-8107-1dfe987436e7/toxakoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf879452-b099-4022-b489-2eb17625a074/juvuwinirijarimituk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/reglamentos_completos_del_basquetbol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/lowol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451fcb73-f4c1-44b8-b3e8-b647bcf15776/spider_man_unlimited_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d9818c7-81cf-4ae0-b27b-2c4f5ff07eaf/31018173062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccaeef13-c60c-4771-817a-046e9dfb56fd/76587364861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/715d0b8b-1d34-4f06-bdff-7e73b88d998c/138577615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee59cf0-77fd-4890-8085-136309273e3b/43599289748.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 extracted file (font_00_sfnt_off00006919.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6919 6088 bytes
SHA-256: a620fccef04fee6a064ddd8a424e5a97eae92dcceabcd48fd145e8d17e701d94
font_01_sfnt_off00007dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEE 10544 bytes
SHA-256: 931ef85709241fe211308023452247f082dde71caef289ef64437433c0f7759e

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