Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc2f7b2c4e149d4…

MALICIOUS

PDF

73.1 KB Created: 2021-02-21 01:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 21fac7fca5c1bace56865c5b2ac41e31 SHA-1: 7c86bf28ecbdf7dca2fc400cf6ff21116f4e1542 SHA-256: 4dc2f7b2c4e149d44f957a7627a53edb588534e9ef6e9e6c61c41c2dbf0688cb
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://jacksth.ru/wix?keyword=forever+sharp+knives+in+usa PDF link annotation
    • https://tofibuji.weebly.com/uploads/1/3/5/3/135309424/vitojuf_ziledasa.pdfIn PDF document text
    • https://gaxowaxogofesix.weebly.com/uploads/1/3/4/7/134719425/5730874.pdfIn PDF document text
    • https://tidatulo.weebly.com/uploads/1/3/2/8/132815220/674149b0f80b89.pdfIn PDF document text
    • https://bonadamoge.weebly.com/uploads/1/3/4/0/134000068/1016614.pdfIn PDF document text
    • https://xeraxoxatetubus.weebly.com/uploads/1/3/5/9/135993523/350936.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/kibutojakazixu-gusuwezure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427528/normal_5ffde59777a61.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/pagib.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/9615726.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/4374745.pdfIn PDF document text
    • https://wetarotener.weebly.com/uploads/1/3/0/8/130813606/juwimetafatalazadeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_60222136ac9b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5fd989c57c963.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/tisegovofu/71546476172.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/rabagororilo.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/angel_broking_account_closing_form.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_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 4952 bytes
SHA-256: 5090ce0a195ce9caeffeb222d4e9cb4773b8f382dbef7144ca823d036ebb9c8d
font_01_sfnt_off0000f403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 10348 bytes
SHA-256: 9d3479bcbede5f2153550a09648caed17604ad902c83463b91ce53fda48562ca

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