Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ea4ecbaef3c624…

MALICIOUS

PDF

77.2 KB Created: 2021-06-05 21:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c758995567bfa317c510643dbbf34f61 SHA-1: 30be1c62320c2a47eaa92dd3ec2c17561184af65 SHA-256: 60ea4ecbaef3c6248f62513ac5c18afd3be27222f82579c355ab98bb68418316
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The authoring application and creation date are also noted as potential indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/123?utm_term=tropico+apk+mod PDF link annotation
    • https://pexaxodosusa.weebly.com/uploads/1/3/0/8/130874045/2983373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_601d7cc689741.pdfIn PDF document text
    • https://ganarusi.weebly.com/uploads/1/3/4/1/134109047/durugojoni.pdfIn PDF document text
    • https://jidukuroji.weebly.com/uploads/1/3/4/0/134013204/ruriviruwezudoligoju.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/tetokow_tovuk_balomi_jasepekaxurek.pdfIn PDF document text
    • https://zutuvolesem.weebly.com/uploads/1/3/0/7/130775525/f5ad1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465018/normal_5fe55c91168e8.pdfIn PDF document text
    • https://wovuwujofisup.weebly.com/uploads/1/3/1/8/131856276/xofuvugubibigim.pdfIn PDF document text
    • https://fitadidexedas.weebly.com/uploads/1/3/5/9/135977916/rijak-dasoruvogamude-jepavuxawukolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486975/normal_5ff3234033a33.pdfIn PDF document text
    • https://luwumevawosa.weebly.com/uploads/1/3/5/3/135322316/xazosoxuzetopomuvuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448984/normal_5ff52e39be1c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://veniwusuj.pbworks.com/f/25129014432.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/w/file/fetch/144506925/camping_merit_badge_worksheet_bsa.pdfIn PDF document text
    • http://sufizilofab.pbworks.com/w/file/fetch/144607017/45921056749.pdfIn PDF document text
    • http://mituxap.pbworks.com/w/file/fetch/144423711/reverse_fmea.pdfIn PDF document text
    • http://nigezid.pbworks.com/w/file/fetch/144591144/74574148964.pdfIn PDF document text
    • http://fevosezew.pbworks.com/w/file/fetch/144599859/35964508806.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/hermosos_fondos_de_pantalla_con_movimiento_para_celular.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 5020 bytes
SHA-256: d797ed370709e3c49ae5d1340f9b2555407c74652732ea9ff4e9433457b23c61
font_01_sfnt_off0001010f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010F 11376 bytes
SHA-256: ef840c9cf1fdef0898b10dafd6d39aec5973ac8a08dae38fe1c6ee5fac9d80bb

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