Malicious PDF — malware analysis report

Static analysis result for SHA-256 998e005e95341b9b…

MALICIOUS

PDF

79.9 KB Created: 2021-02-27 06:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: afc3a9907ab0265147df0ce13b30e584 SHA-1: 5082588909289fff3059672a7be7b1ba10c08f90 SHA-256: 998e005e95341b9bbd181986758c06e793760558c0e05887d864e218f959ace5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous external URIs, with one specifically noted as a link farm on disposable hosting. The document body, though heavily obfuscated, contains references to 'award' and keywords that suggest a lure. The presence of embedded URLs and the link farm heuristic indicate an attempt to redirect users to potentially malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=bq-cc+17+sba3 PDF link annotation
    • https://cdn.sqhk.co/fefamuve/pcozjgN/can_someone_draw_me_as_an_anime_character.pdfIn PDF document text
    • http://laxeded.iblogger.org/wosubu.pdfIn PDF document text
    • http://istlan.space/best_survival_movies_2020fp0yb.pdfIn PDF document text
    • http://gagipelujer.iblogger.org/gateway_2nd_edition_b1_workbook_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_6036ffad09a2f.pdfIn PDF document text
    • http://cookwellbakewell.com/30699841560jsz3h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_5fd7755939aba.pdfIn PDF document text
    • http://0fruits.space/48929789504laj5e.pdfIn PDF document text
    • http://veronaital.space/duvafikosetekiz2qlyw.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/gitIgjk/viwujuzeludedasawupu.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/hpiahj1/mobogowabusesogakepalugow.pdfIn PDF document text
    • http://silvanozito.online/windows_10_free_20177vz0m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5fd37a594850f.pdfIn PDF document text
    • http://sberbank.link/what_daphnia_eatb5nu9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_60146136c216d.pdfIn PDF document text
    • http://smcjd.com/rudupefvbkoy.pdfIn PDF document text
    • http://contentmedialiteracy.com/porofufukajipitugizembvbr1.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/figo_guidelines_for_missed_abortionwn94e.pdfIn PDF document text
    • http://snail-case.store/jesurivuwenofoveko8dwrn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juzefabamurever.rf.gd/lisaregozabujamesifojiz.pdfIn PDF document text
    • http://tudavoje.epizy.com/que_es_cascada_de_coagulacion.pdfIn PDF document text
    • http://gidubivej.rf.gd/gikuduxelawamob.pdfIn PDF document text
    • http://lukovim.epizy.com/osha_injury_reporting_guidelines.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65C 5308 bytes
SHA-256: eb6dd0b4beefc22266d1b79049f3ddf022a30ea4c546a1b2ce6ae08d3b73da6c
font_01_sfnt_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 15056 bytes
SHA-256: f6bdf900d0454ab64438e416651769fd3055bb6e21a9557742d88c49e623dd4c
font_02_sfnt_off00011826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11826 17500 bytes
SHA-256: b5b49602659617a208b21a38736a8c64ee4525f6bb9af0478cf614f443a66f76

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