Malicious PDF — malware analysis report

Static analysis result for SHA-256 52128c1eac446f99…

MALICIOUS

PDF

69.5 KB Created: 2021-01-26 18:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 32a0f9e4b4b32533d62d4d7b07155011 SHA-1: fc515023b27b24d6de2ddc0508df0b4c84cac6ec SHA-256: 52128c1eac446f9914c385c59de0f4e38fb769e22f6cc9d8527e77330e0afae2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=mars%20time%20delay In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5fd1a0e16ff07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500679/normal_6000a20b2b142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_600ea603b04de.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/ivjbaji/uncivilized_person_synonym.pdfIn PDF document text
    • http://tirudibemaj.22web.org/free_burner_phone_app_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5fc935116e692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370068/normal_5fcb6358b0b86.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/YDIieig/cardboard_chimney_diy.pdfIn PDF document text
    • http://makeyourself.xyz/herbal_essences_color_me_happy_conditioner_ingredients15fua.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/F4jh6if/wind_rider_auto_woodbridge_virginia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzariwa.rf.gd/computer_graphics_tutorial_point.pdfIn PDF document text
    • http://pumonufagatoteb.epizy.com/68544703739.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/curso_catia_damasceno.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/kelolo.pdfIn PDF document text
    • http://vinegufoxa.rf.gd/godosizizarebak.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_off0000d5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A1 5076 bytes
SHA-256: 517a45cbd83de654c49eea8848cfd3ff75da321db472a438b00953d64b8b29dd
font_01_sfnt_off0000e6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 10240 bytes
SHA-256: 2c6c16d4e69840424a364ea8db1834d2f01765ab05c6f9659a1fb8f014f4680c