Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec744931986e919…

MALICIOUS

PDF

39.7 KB Created: 2020-11-07 03:20:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 577c7e860bef11696299f33e46cccafb SHA-1: 05ec1e0ed1b4cc70d8393884518cb447ef841cda SHA-256: 8ec744931986e91980116e0978a5ce5b2ba4a99aec5bd9d1598d0b355358cd5e
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=royal+oaks+elementary+school+sun+prairie+wi PDF link annotation
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/b7359.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/7372584.pdfIn PDF document text
    • https://zutafemaz.weebly.com/uploads/1/3/4/4/134478566/remubapegej.pdfIn PDF document text
    • https://bekonerotukabi.weebly.com/uploads/1/3/4/3/134366377/621922.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/negeloxuxos.pdfIn 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/b30090d8-28ff-4c64-b058-2f0a2a8330f9/kurupusom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d60780-0a71-41d5-8938-67580d1e0ad7/56880741019.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ff7974-bfb3-48a4-9225-38c2c65ac7af/mojiwunado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e69ec6a1-92a4-4668-b816-4f5fab7919d9/49795160729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868e7636-5a09-4452-b9a9-55165bf8a7b3/96387313534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71805c84-6e9d-423c-82fb-07ec4433399a/lorazuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3da4319-a1d9-4198-bdc2-166d32ce8301/adventure_quest_worlds_hack_free_ac.pdfIn PDF document text
    • https://gowatomu.files.wordpress.com/2020/11/kopewogapewofemalopibefi.pdfIn PDF document text
    • https://joxonep.files.wordpress.com/2020/11/96408350088.pdfIn PDF document text
    • https://pafegum.files.wordpress.com/2020/11/xumakosokidazok.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5967 5436 bytes
SHA-256: d713fb1aacc339c2f38f94242ed490aace664d1759c5ca790dedf3ce7b0a92bb
font_01_sfnt_off00006bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD8 11644 bytes
SHA-256: 87a285f5c0eeb51e0686d784f987a4985938b7f6dbcb2be551e401316bb48b48