Malicious PDF — malware analysis report

Static analysis result for SHA-256 5359c567969be235…

MALICIOUS

PDF

75.8 KB Created: 2021-06-01 08:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8dd0ec1580aa2fa1f46f2a40a5bab199 SHA-1: 54dd736d9fbde124ffc2cc73c92a76e90e1992a9 SHA-256: 5359c567969be235cb21b3bc4b128f18bb08a6e9ba6be3162b5ad7cd58639db3
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains references to 'penny stocks', suggesting a lure for financial scams or phishing. The presence of external URIs and the link farm heuristic indicate an attempt to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://infrive.ru/pbw?utm_term=penny+stocks+to+watch+today+india PDF link annotation
    • https://luketekovagitor.weebly.com/uploads/1/3/4/2/134236109/genovanatubed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502236/normal_603eb0aed28ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485165/normal_5fec7bad0c6a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_602796222937c.pdfIn PDF document text
    • https://limakeluror.weebly.com/uploads/1/3/4/6/134657352/30349c54c4381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410727/normal_6039eb4e628ad.pdfIn PDF document text
    • https://giwizakewat.weebly.com/uploads/1/3/1/8/131857916/rifesisudog.pdfIn PDF document text
    • https://duguzimelape.weebly.com/uploads/1/3/4/6/134666192/pijeguzoxekus.pdfIn PDF document text
    • https://sabovewedasujak.weebly.com/uploads/1/3/4/4/134493104/7428830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_6061575da2f24.pdfIn PDF document text
    • https://pevigegokepos.weebly.com/uploads/1/3/4/3/134366184/xaloma.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/6097039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144425886/sigma_bc_1609_sts_cadence_manual.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144415176/74396735719.pdfIn PDF document text
    • http://xawaren.pbworks.com/f/ferivatagurova.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144421224/magimediwewexomorofitanuk.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144431289/nintendo_wii_sports_resort_island_flyover_locations.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144433431/examen_final_de_matematicas_para_segundo_grado_de_primaria.pdfIn PDF document text
    • http://xofitesu.pbworks.com/f/el_prncipe_de_las_mareas_ver_online_espaol.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/wijujagiwisegakoninowekit.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_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 5160 bytes
SHA-256: e9a42e7a31fe9f858b64248c06dbf7f57010ee5a6e3e77a5d529494f0f8dd57e
font_01_sfnt_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 11168 bytes
SHA-256: 50a1294a93b754f5df83fdc12d686da8e8ac3c533eaf3226e5eba7389fc4d29f

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