Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c55489da49b02e…

MALICIOUS

PDF

69.5 KB Created: 2021-02-12 18:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f34ff2f4c522f3a21ad0b51b9969a621 SHA-1: 807a8a86d9a13550049d615cda84347a276563b8 SHA-256: 40c55489da49b02eb956b29402a8d7d57d4e59f33636136fb06ed425e692f521
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://seumenha.ru/wix?keyword=triangle+congruence+using+asa+aas+and+hl+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450152/normal_601c947875f4f.pdfIn PDF document text
    • https://puwaxitakobesod.weebly.com/uploads/1/3/4/1/134109073/44563d7b5e7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_601bde971d408.pdfIn PDF document text
    • https://dowozazufexu.weebly.com/uploads/1/3/4/6/134606261/kokebejivumizebok.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/11274733681lg751.pdfIn PDF document text
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/waloneg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_5fe70c05edd68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417519/normal_5fcc760291e99.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/bofobipabopuwo_wisupol_tetawa_xodukafanejefik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462075/normal_5fc9cff5b7e2f.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/76948.pdfIn PDF document text
    • http://it50discount.pro/split_rows_into_sheets_exceln5tva.pdfIn PDF document text
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/465717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_5fd99d7db21cb.pdfIn PDF document text
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/7d9a67948b1141b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nodezolejew.epizy.com/kaperupumixugewodewes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62B 5188 bytes
SHA-256: 66e639e7c00c08d83a2fd680f9032c3132c397e767953a923dab83a38796a2fa
font_01_sfnt_off0000d7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CA 9984 bytes
SHA-256: 64dc7814aa101631677afc6a13038dea61de857ac953a017556cda8c9e5b9b8b
font_02_sfnt_off0000fa06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA06 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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