Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9f2a710d9d8840…

MALICIOUS

PDF

72.7 KB Created: 2021-02-28 12:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c3c978838a15f437f86f7b15433ea4a7 SHA-1: ae971f0453747de69a1db9955eca21f0f9802926 SHA-256: dc9f2a710d9d884054b750fc4f6d6383e6b691395e517d3271f7fa6ac7e94113
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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://gimoguvi.ru/wix?keyword=the+mechanical+universe+video+18+waves+worksheet+answers PDF link annotation
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/7779992.pdfIn PDF document text
    • https://jitotapo.weebly.com/uploads/1/3/5/3/135314003/68221be2baba577.pdfIn PDF document text
    • https://xixilizuxuwogag.weebly.com/uploads/1/3/4/8/134879277/nebize.pdfIn PDF document text
    • http://jijufik.22web.org/thank_you_powerpoint_template_free.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/bebebotatojija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_60027544dfff1.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/74168855806.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/bertrand_russell_history_of_western_philosophy_gutenberg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418972/normal_5ff3cdea16e07.pdfIn PDF document text
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/mazoxowazozigoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivimufe.atwebpages.com/how_to_use_turtle_beach_xl1_on_xbox_one.pdfIn PDF document text
    • http://jebejabekuja.epizy.com/fidabi.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/python_is_object_oriented_means.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/characteristics_of_short_report_in_business_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/quais_sao_os_tipos_de_ficha_de_leitura.pdfIn PDF document text
    • http://zevusup.atwebpages.com/multiple_intelligences_gardner.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_off0000df73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 5588 bytes
SHA-256: 789c208080e82b556b36d939cbb21d0318e6a172f74f8bd647f4ce2ae6532739
font_01_sfnt_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 10300 bytes
SHA-256: 78035370f977a55300f2dd28c51d66c510f0f6e9d43fc4a45aab5d5048751d41

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