Malicious PDF — malware analysis report

Static analysis result for SHA-256 248ff87221a03def…

MALICIOUS

PDF

70.8 KB Created: 2021-02-27 12:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b4ad019b0983cd7aa087ff81a084ee79 SHA-1: d0ef77d505bdd00ee47691b598d182360253ebce SHA-256: 248ff87221a03defc50614a876ea65951309ec25a20dc1ffe9f822e5137063ac
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://nipisod.ru/wix?keyword=direct+and+inverse+variation+worksheet+pdf+answers PDF link annotation
    • https://rororejiwep.weebly.com/uploads/1/3/5/9/135966539/2116e46f79.pdfIn PDF document text
    • https://mijolepeworid.weebly.com/uploads/1/3/5/3/135394353/2cf6f6ee.pdfIn PDF document text
    • https://joripulugafu.weebly.com/uploads/1/3/4/3/134318872/zogitu-vunujorudike-mejorewiduwu.pdfIn PDF document text
    • https://jebigifapiw.weebly.com/uploads/1/3/1/3/131379276/jevetizezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476150/normal_6030974f7e358.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/KLmicjG/miniature_pigs_as_pets_australia.pdfIn PDF document text
    • https://vebodejivab.weebly.com/uploads/1/3/2/3/132302978/6bb62cecbc25c.pdfIn PDF document text
    • https://nebenumepidenok.weebly.com/uploads/1/3/5/3/135307723/xavobuzojeraw.pdfIn PDF document text
    • https://giloxegikejuzun.weebly.com/uploads/1/3/4/7/134712531/3f111c952d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_601105892f8ec.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/6190565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_602065e16eb3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_5fc8964d526ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481286/normal_602fc21a16dab.pdfIn PDF document text
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/wisolituxopefuxujupu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokosen.atwebpages.com/is_the_spy_museum_in_dc_worth_it.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_off0000d947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD947 5424 bytes
SHA-256: b4aad1cbf486e0dfbafeb1adf7737feb694309be4a180e2c268a2b5c00a916d9
font_01_sfnt_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 10088 bytes
SHA-256: dc191704329d61621a148678c2c1d9e4bd95f34a1dc144d328981dd4ffda70ed

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