Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6b290f75639991…

MALICIOUS

PDF

36.2 KB Created: 2020-10-08 04:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 6e33a384c7cdb45b4c0bd17248f91a92 SHA-1: 457ee41548b1f30be07fc42d350a1828135a6dfb SHA-256: 9c6b290f75639991461bec2913661d1a01eaa93efa1e58bef6fbacb2b11f5397
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://ggtraff.ru/strik?keyword=hoja+doble+raya+para+imprimir In PDF document text
    • https://site-1036945.mozfiles.com/files/1036945/fozavagoledozijobus.pdfIn PDF document text
    • http://files.m131491.com/uploads/1/3/1/6/131606408/3529780.pdfIn PDF document text
    • http://files.integritybuildersandassociates.com/uploads/1/3/0/7/130740385/mupobasuwaru.pdfIn PDF document text
    • https://site-1038963.mozfiles.com/files/1038963/rizizedefolaxepefejufote.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/49386497360.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/dizazaropisavunuriki.pdfIn PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/25374662356.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/79e78806-4f53-47bc-9630-32266f6b5530/pepobika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a722d19f-c33a-436b-af69-d4f83cd0fb7e/kajaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb7a45a-babc-4e25-a354-dcad8bfa5dcf/regugidife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af59314c-0d2e-4127-bffe-6e83cb5a0da0/vuxafexiwupozoxod.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_off00004f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5D 5204 bytes
SHA-256: 67c3e12c06bc5aa25c0d763f96c03085d4a59b996edf8ef45fad48466cd53b95
font_01_sfnt_off000060ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 10472 bytes
SHA-256: 44a2d23f958a92733caa876c2b1c77edc943b6a40b7a5ab44c9e47b097e02865