Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8ae6697ea8e510…

MALICIOUS

PDF

43.9 KB Created: 2020-10-02 09:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 51d44d97f1e35bd09d78461203661774 SHA-1: 668c58aa4ccfcd8d28d0206e1f9c546d69490dfb SHA-256: 0f8ae6697ea8e5108066d05c2491b02456137a6432aac90f70c167dc648c4868
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/strik?keyword=drawing+lessons+pdf In PDF document text
    • http://lelif.summertromboneworkshop.com/uploads/1/3/2/7/132710621/710186.pdfIn PDF document text
    • http://biruwedu.classifiedufo.com/uploads/1/3/0/7/130775286/tunalixiteg.pdfIn PDF document text
    • http://files.shishonsports.com/uploads/1/3/1/4/131438471/kememiwa.pdfIn PDF document text
    • http://files.heritagephilharmonic.org/uploads/1/3/2/7/132710491/zibulajukopipu_tatajopivedije_fazelejorufojim.pdfIn PDF document text
    • http://files.hanskombucha.com/uploads/1/3/1/8/131856173/fixukakutegamoga.pdfIn PDF document text
    • http://xajeses.guideturisticheancona.com/uploads/1/3/2/7/132740917/disexominuwuzuvug.pdfIn PDF document text
    • http://files.bathstringsacademy.org/uploads/1/3/1/4/131437490/tesefeti_rudoradumu_fokuzexob_jaxevuzolabezid.pdfIn PDF document text
    • http://files.smhsbaseball.com/uploads/1/3/1/4/131412032/dodasinafubof-mewepepevefi-buvaludade.pdfIn PDF document text
    • http://nemibuz.ostendmarineservices.com/uploads/1/3/0/7/130738836/913396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0414/6076/files/retexavapuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9033/2836/files/slader_modern_world_history_patterns_of_interactions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/dragon_ball_z_the_worlds_strongest_timeline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e2f1c0-1b44-425e-942c-b1d1a636edd1/66712713449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe4c858-aa10-4e2e-9abf-610da72aa7ea/71184305953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9890a2-03a4-4faf-9433-2b89d711e531/vumar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc8476c2-684d-40bd-87f1-9de2929db53c/58285070363.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_off00006ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED4 5300 bytes
SHA-256: 9d256c07cf4b5b37b2b28bb66cfc9f60747326ee10f2a99a27110f751ecdaaac
font_01_sfnt_off00008105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8105 9832 bytes
SHA-256: d1d56af2138adde047786822aed1ba7783989584c239068ae444c9cd14fdbd2b

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