Malicious PDF — malware analysis report

Static analysis result for SHA-256 823864a8e5edf1f1…

MALICIOUS

PDF

71.5 KB Created: 2020-12-31 10:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 936fff7060c4a2b18cab4847df59ee15 SHA-1: 84f658e21fcb3b2662d9fd19b70b92ea4d05306b SHA-256: 823864a8e5edf1f14f157673b32d0232651f12d98ceae118297a06ef5e08459f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/shook?utm_term=color+by+number+printable+math PDF link annotation
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/rudunijubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5fa7fa65451a3.pdfIn PDF document text
    • https://notojusuwetu.weebly.com/uploads/1/3/1/8/131871856/5d085673f5.pdfIn PDF document text
    • https://fevuleniwawe.weebly.com/uploads/1/3/4/4/134476097/jakivibeloto.pdfIn PDF document text
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/ludesajepimipotezi.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/gafuzekuzijadupomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_5fafa4de44009.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/sepiwuxarawa-resuweduvew-fiwawabu.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/608f8f8e-cc13-407f-91f0-2db599b15f98/70582184012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc1c041-c779-452c-8915-08a2ce4a2352/reclaimed_asphalt_maine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a29d65-9677-4a00-ac19-d44d89f9a98e/rojunojepaluboguruseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf6ad15-9ccc-4408-b340-e610220bad53/molekasoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487aec23-a6a9-41d3-a0f2-2dbcdd34166b/12674734404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3548d8-fe60-4e36-966e-73deef500d9f/xenub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69253d01-4db2-4809-a6ab-2ac9c5d49472/kibekaliseli.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_off0000dc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC79 5028 bytes
SHA-256: 3af71c9b19e609d1b037bf26638e6918884e502d5c5b1a1d9685a917ecf98958
font_01_sfnt_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 10460 bytes
SHA-256: 035b3a490dcbf8b55a61d4a99d0c9a5a4a0d79f9031479614f70a2b1abd257ba

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