Malicious PDF — malware analysis report

Static analysis result for SHA-256 6837079b3d57dac4…

MALICIOUS

PDF

73.0 KB Created: 2021-01-14 12:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 84353b627fc60624f89a218b01d5af47 SHA-1: e12bb563517dc0a8e41ffc8526012c75488656f6 SHA-256: 6837079b3d57dac4d642735382b6baa6729b804a49a8923b6076613462d8b38f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=rival%20knights%20championship%20not%20working In PDF document text
    • https://static.s123-cdn-static.com/uploads/4367951/normal_5fffc01ac9e47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_5fba97d33da6f.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/chjihj9/56598508295.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/8825171.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/nebisowunixoxa_gubitulajozox_nepida_rabodawoxawa.pdfIn PDF document text
    • https://vinifobak.weebly.com/uploads/1/3/5/2/135298549/geronavala-nazeruwag-fukepa-torobepevevu.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/gjjf8pn/madness_combat_11_music.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/cc5bde07035bf6c.pdfIn PDF document text
    • https://tuvaruwa.weebly.com/uploads/1/3/4/7/134711775/887419f9458e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/63885165621.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/live_stream_tv_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/ligif.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/lukebubis.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/zepefovijetapur.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/induction_cooking_buying_guide.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_off0000e0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E9 5572 bytes
SHA-256: fbc938cb96ac5ac1aa54dae0f6afd65f20b5002ba7a79e01fddae004a1da3904
font_01_sfnt_off0000f3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 10324 bytes
SHA-256: 9c4e7fe0aa453fd9acc0ec7f33acbdb3b5f9b4a22424b3ac3437a848414d4e92