Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db91a6b6e9835a1…

MALICIOUS

PDF

69.4 KB Created: 2021-02-22 12:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eab05d8295f6d70f536beab94937f0ca SHA-1: 0a5fe46cf172579039df167fa5c5cbc1c42c0bf3 SHA-256: 4db91a6b6e9835a1da02ebae9cd639edeb3ca726b53bb7ae2415eff64ac5d5ad
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://bologen.ru/wix?keyword=ustvnow+apk+for+firestick PDF link annotation
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/seturowebegawe_jijejijizar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_601b52e5213a1.pdfIn PDF document text
    • https://famuvotatag.weebly.com/uploads/1/3/0/8/130813835/5705832.pdfIn PDF document text
    • https://sunutefe.weebly.com/uploads/1/3/5/3/135350425/b93242.pdfIn PDF document text
    • https://vevuwameran.weebly.com/uploads/1/3/0/9/130969214/1175567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_6032b71bdf2ad.pdfIn PDF document text
    • https://lideteli.weebly.com/uploads/1/3/0/7/130775407/bubexumisu-tatuvudewegit-sabuxujevo-bexejamagiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/gkjPjaX/58792812694.pdfIn PDF document text
    • https://sesadawaroni.weebly.com/uploads/1/3/5/2/135295108/pojulo.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/jazamerijekufol/bus_simulator_game_free_apkpure.pdfIn PDF document text
    • http://mivolipo.epizy.com/mutofowovunosovef.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/wavelepopu.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/artifactory_folder_curl.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_off0000d49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49C 5184 bytes
SHA-256: 64692cf6cd39a0c85847c9a97d6f765c5bb7a2bc9bb96a194e1b272260c0aabb
font_01_sfnt_off0000e671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE671 10176 bytes
SHA-256: 5ee785e0f393bce668ab4c554ffdf96af4e88cf67bf019de7b0b7e76bb86bed7