Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef19b5e748c02d05…

MALICIOUS

PDF

68.4 KB Created: 2020-12-29 11:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 2e1b148449fc3cb2ad48cf98d95ac8f9 SHA-1: 0c2d37d9e186c467bb07d921a52c2ceed5d66a7c SHA-256: ef19b5e748c02d057fbe397ae2d03dc72d3cb5ace8521bc8e946c51c04a816bd
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/wb?keyword=occupation%202.%205%20apk PDF link annotation
    • https://cdn.sqhk.co/kalijada/R061ENk/ball_into_washing_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5faf685e03f4a.pdfIn PDF document text
    • https://vapipokolodux.weebly.com/uploads/1/3/4/3/134307816/mavaxabit.pdfIn PDF document text
    • https://ritosigom.weebly.com/uploads/1/3/1/4/131453630/lowukuzorak.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/jTbMWii/11951605535.pdfIn PDF document text
    • https://gijifapezikad.weebly.com/uploads/1/3/4/6/134644128/witaje.pdfIn PDF document text
    • https://nigafabap.weebly.com/uploads/1/3/4/3/134377596/dadogul.pdfIn PDF document text
    • https://zanorima.weebly.com/uploads/1/3/4/6/134624551/2a1d4e21fa81bd8.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/661d4ac2-06a3-4349-ad34-85fbc521d637/bracelet_d_amiti_pour_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60721840-66ef-47a2-bc7b-c6524929a5e1/1945074877.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/jumabujamefobibizodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc5f70a-fccf-4c6c-a10f-dfe92c6afc29/vuzigamafurotexizefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2864d3fe-914f-4cdd-8bd6-4b16d912ba6c/42241386478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82546604-6ef6-43b2-8210-f57083d688fd/sokituvenukilezubipobemi.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/zuforowipawivofivoro.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_off0000cce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE6 5000 bytes
SHA-256: 1abf17b5b6c7880f6faa2cdbbeb1baa47d2f928521d6d77260fd42f7df2f87e5
font_01_sfnt_off0000de0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0C 12160 bytes
SHA-256: 6ad366bc4c75ac2ba1ff69a8fe8200bf733b0e442edae35fb6d1919027ca4ef3

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