Malicious PDF — malware analysis report

Static analysis result for SHA-256 af18f87b3804771d…

MALICIOUS

PDF

71.2 KB Created: 2021-02-12 17:38:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: deb46954518765df8de686ecb4d43ec1 SHA-1: b44caafe6d0ddd4233b4b8b64b05042be4c00ed1 SHA-256: af18f87b3804771d4ebb221f93266c0b2e13bf6458a0f80423f3a2d1923fc153
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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.
  • 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://crophysi.ru/wix?keyword=car+wash+for+sale+detroit+michigan In PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/pekafep.pdfIn PDF document text
    • https://cdn.sqhk.co/soredepel/hkojaie/pathogen_earth_science_definition.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/e8a28188c20a.pdfIn PDF document text
    • http://promooffer.site/816636271648999u.pdfIn PDF document text
    • http://innov-cis.net/38692389662b7qyc.pdfIn PDF document text
    • https://meronikam.weebly.com/uploads/1/3/4/7/134705372/7845063.pdfIn PDF document text
    • http://armada.technology/before_i_wake_movie_kickass9zj0m.pdfIn PDF document text
    • https://tekoboxini.weebly.com/uploads/1/3/0/8/130814877/xuleregexopemujozuw.pdfIn PDF document text
    • http://arm-watch3.club/7718469889zbug4.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/hdMphi8/bandicam_download_crack.pdfIn PDF document text
    • http://simkosa.website/sinagageyanu0.pdfIn PDF document text
    • https://kagesurofuzesik.weebly.com/uploads/1/3/5/3/135303772/8086469.pdfIn PDF document text
    • https://duzesoduvumasu.weebly.com/uploads/1/3/4/1/134131570/lemefosatun.pdfIn PDF document text
    • https://rajidekexosixi.weebly.com/uploads/1/3/0/7/130738830/08801ab49b8c8.pdfIn PDF document text
    • http://ersoil.fun/witirijadeb32wg6.pdfIn PDF document text
    • https://vonuvevija.weebly.com/uploads/1/3/1/4/131407152/108f2a6f.pdfIn PDF document text
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/koviroruf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93E 5432 bytes
SHA-256: 3a68f52b550c405279d6f031932389b178bbb58d12efaa32ced7082b3ab11741
font_01_sfnt_off0000eb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 10564 bytes
SHA-256: 2294eda199500efff714b461cca7e355287995f7b9caff5fbbf42fbbbdf42320

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