Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec15abef77dfe071…

MALICIOUS

PDF

37.1 KB Created: 2020-10-31 05:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: df055be85b6df0e1bfa5b9a54758f4b0 SHA-1: df9af233ab38828296a7b1edadc5768b65025333 SHA-256: ec15abef77dfe071c80a8ed2cfdf177688866d5b33fcd7e3624d9c556b0d77c7
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/pify?keyword=constitutional+law+outline+harvard In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5f9b7e97b6dcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f94777a4405a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393898/normal_5f8efd448779f.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/milutubonelalovugixa.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/tijuguvopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f8d987515ba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f8d622a8cfc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8ae64432b16.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/kegorez-tupuxigetem-wigarozumunure-wiwinimafu.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/jevejaravijuso.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004837.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004837.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00007964.bin)
    • https://uploads.strikinglycdn.com/files/39c7b3e5-cc05-4b04-aece-5a4cfd6f80d1/96399766875.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/harley_quinn_arkham_city_dlc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c0d0aa-7545-4a78-90d2-2749a2aa6335/redelafejaga.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/philips_respironics_bluetooth_module_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3cba5e5-3f80-4353-89cf-b2c663fe3c60/sajojidexetep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b840fba-53c7-494e-92b9-8c3f6fb434b6/73749885102.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 extracted file (font_00_sfnt_off00004837.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4837 4968 bytes
SHA-256: 87edb0c9519bd10c74eed89d1310cacbf589c1e4e7b9de2c7efa4c1c05a4f2f0
font_01_sfnt_off00005922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5922 9444 bytes
SHA-256: c7ebb9d3a2479859aa177dacd53c54f87e62c6506415ce215d1c3309d64f52c0
font_02_sfnt_off00007964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7964 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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