Malicious PDF — malware analysis report

Static analysis result for SHA-256 4016db447c213ab0…

MALICIOUS

PDF

70.4 KB Created: 2021-03-17 14:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8cf55a53bfa6f75a66485b83803c3e53 SHA-1: e414616e6274e87801ca9d829ffde9289ae4b805 SHA-256: 4016db447c213ab04bc608f59e26082d9f39ef3ad45b12f8b4d92f2c3a4bef63
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing lure, likely using embedded JavaScript to facilitate redirection or exploit vulnerabilities.

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://nipisod.ru/wix?keyword=6-karyotype+worksheet+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455684/normal_601f1cc48c308.pdfIn PDF document text
    • http://123dutch.com/understanding_and_using_english_grammar_4th_answer_keyidf5k.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/how_much_is_amazon_echo_dot_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_600a8904c2415.pdfIn PDF document text
    • http://bunakevogipo.iblogger.org/android_jetpack_lifecycle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_601381193ae57.pdfIn PDF document text
    • http://anarchymedya.com/92049295997vkhs6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_604eb3d152994.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/4icKjhO/tnt_mod_minecraft_1._14._4_download.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/jbghuje/xolekajik.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/jfYgiqR/dungeon_nightmares_2_free_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/oemvjhZ/66220926433.pdfIn PDF document text
    • https://cdn.sqhk.co/lidojuxuxiro/4Q6rgiz/kaala_patthar_movie_songs.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/are_all_witcher_books_good.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/characteristics_of_femme_fatale_in_film_noir.pdfIn PDF document text
    • https://cdn.sqhk.co/wimakebibane/jfpWLgf/nhl_score_predictions_for_tonight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426413/normal_5fcaf897aee2a.pdfIn PDF document text
    • http://storeeu.info/davax83a9m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://petalewoxux.rf.gd/soxibof.pdfIn PDF document text
    • http://xazitew.epizy.com/python_chromedriver_folder.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/diablo_iii_season_22_start_date.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_off0000d71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71C 5224 bytes
SHA-256: fc09b2c635098aae5c59c12a76bec57f7e48f5d05c83d16c61e65defed50ee02
font_01_sfnt_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 10348 bytes
SHA-256: c2295b39d561dea67c38964acd1c0faa52e8c89f22e09da0362eec80925850fa

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