Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f682b2026c1cd53…

MALICIOUS

PDF

45.6 KB Created: 2020-10-09 04:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 35a3088df630acf0db0514aa9f4ee4b5 SHA-1: 799a0b3c2012e29513da7b587b053bef9a25b491 SHA-256: 7f682b2026c1cd5352b64b42ae5a596bb22d7f985bd6beed1c14803bec69c833
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=bonfire+childish+gambino+download+mp3 In PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/bikilezaximelewezafewen.pdfIn PDF document text
    • https://site-1042711.mozfiles.com/files/1042711/560927338.pdfIn PDF document text
    • https://site-1038938.mozfiles.com/files/1038938/29570521422.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/bafibap.pdfIn PDF document text
    • https://site-1038988.mozfiles.com/files/1038988/20068271395.pdfIn PDF document text
    • https://site-1037867.mozfiles.com/files/1037867/86548610517.pdfIn PDF document text
    • https://site-1039783.mozfiles.com/files/1039783/34590218705.pdfIn PDF document text
    • https://site-1038395.mozfiles.com/files/1038395/3284866468.pdfIn PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/defexidegotedorazivagof.pdfIn PDF document text
    • http://vutipu.cithebrand.ca/uploads/1/3/1/3/131398440/6c52c4.pdfIn PDF document text
    • http://files.eastcoastbikeride.com/uploads/1/3/1/4/131438541/xijerekenidate-gixerape-jirupaferoda.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0463/6160/8347/files/bohemian_rhapsody_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/5787861307.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_off00005680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5680 3036 bytes
SHA-256: aa5372358103b7cc4ef908374b598f052ee1396b52dcf70fa50afca2ab89f292
font_01_sfnt_off00006392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 6016 bytes
SHA-256: ceaec6071a64b609cd3873377a366ca666d357a9066e74686f25f6df0954c29e
font_02_sfnt_off000077fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FA 15260 bytes
SHA-256: d5eeb77861e52e8e7202e8f84e0ccbce9da5ae30a5b0b3cb0a7f5a15a4f6e382

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