Malicious PDF — malware analysis report

Static analysis result for SHA-256 437332a4d004ed42…

MALICIOUS

PDF

75.3 KB Created: 2021-02-12 22:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5560b9eb1b95efe5b3a8eaf02a9cc71e SHA-1: 35b28e8720abfe98b71e12da91da87a5accb0c37 SHA-256: 437332a4d004ed42627f50eabfbc76ebaac71f11b6f835887c6f98a0588d4b12
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=ios+7+camera+apk+for+android PDF link annotation
    • https://cdn.sqhk.co/vapatibu/BCqcijv/offline_language_translator_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_5fdb32e30d35b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408460/normal_5ff86b105cc49.pdfIn PDF document text
    • http://counterman.ru/tuturezoxiwofegaw65bau.pdfIn PDF document text
    • http://antonioita.fun/kpss_nlisans_matematik_soru_bankas3zd8p.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/UjcXhaT/sujosanoguzozezelomut.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/i9Mb0iT/saxujupoduj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489607/normal_5fe64bbfc7b3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fd894b233cc7.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/eimAihP/40440243618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_60210ec25edd4.pdfIn PDF document text
    • http://meetchat.space/xiruperekitar2jk80.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/d17057394c2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://japorivexasore.epizy.com/notigifagufomowofopu.pdfIn PDF document text
    • http://dedalumakur.epizy.com/media_relations_definition.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_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 5352 bytes
SHA-256: a24ccb485a53382a0c7aba31a8fee925954d13fb9cc9b2b9b2cccbf74609631c
font_01_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 10200 bytes
SHA-256: 3a0b2bb1827de9694308f802dfc8f0298b1aefe539a412100b2e8e0707f02db5