Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e24164fd234c2f…

MALICIOUS

PDF

78.1 KB Created: 2021-03-07 14:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4dc5efbadcbd808d13307d0805e78b8c SHA-1: 59fbe882ae1864a01b37b41f79b22f5b88321854 SHA-256: d3e24164fd234c2f7495a1214ac1709493d3a162f8097d1a22a8f0b395eea849
126 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable or unknown-reputation domains, suggesting a link farm or redirection mechanism. The PDF's structure and embedded content, though heavily obfuscated, indicate an attempt to disguise malicious links under the guise of academic or informational documents, likely to trick users into visiting harmful sites.

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://ponafet.ru/wix?keyword=reinscripciones+uabc+seleccion+de+carrera PDF link annotation
    • http://nowtorrentz.com/56621170490syn6w.pdfIn PDF document text
    • http://banuzatama.22web.org/74202773582.pdfIn PDF document text
    • http://thesimplycompleteseries.com/fundamentals_of_financial_management_concise_7th_edition_solution_manualvx8m5.pdfIn PDF document text
    • http://digitalmicroteter.xyz/python_snake_case_to_title_casec1ro7.pdfIn PDF document text
    • http://jofigapowewumaw.22web.org/64559425366.pdfIn PDF document text
    • http://vovality.club/addy_nagar_all_new_songa65wa.pdfIn PDF document text
    • http://towumodoxilokox.22web.org/37400326262.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_dc39bb16744f4a4fa059f55de7047498.pdf?index=trueIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_e8608398626b4bef9c39d36c8a4b4908.pdf?index=trueIn PDF document text
    • http://nifuxezelepet.epizy.com/mivebamido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039daab4-051b-4ada-a913-16f0597efe14/accu_chek_performa_error_code_9.pdfIn PDF document text
    • http://zisoramemib.rf.gd/psychological_assessment_intake_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a1e5fc-9e99-4727-88c0-b3416559ec8d/wemadupusa.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_551e90daaa7e4a4393132d759951a488.pdf?index=trueIn PDF document text
    • http://rirojirijuguga.epizy.com/zuweroresadavepokomevu.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_1a93ba5870644ca793628ec1f8d79c81.pdf?index=trueIn PDF document text
    • http://felepukagerek.epizy.com/jafawobiruloniwopoxakoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 1848 bytes
SHA-256: 76c45c27c9a95be1c74ad767d49fdd797c3b336619fdc504ea250a3fa7cb0da4
font_01_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 5216 bytes
SHA-256: 5efca3445da13a416d1e914c012e2a9838854a6a9ac0dd24cda4f3d7d133f954
font_02_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 12724 bytes
SHA-256: 10eaeedc62db4c555a8cbc948c0ac6a09ef8ae1be72cd3c5b03c75faac981f74

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