Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45a63780faa3066…

MALICIOUS

PDF

81.0 KB Created: 2021-03-23 10:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3d8a06000934dabe314ae8cdd104915a SHA-1: bd0b0aafdee2eecde6951019db4d0c61c46e8554 SHA-256: c45a63780faa30661549f93311469d104bd5f212bad593e5f7edbc1c77ede82a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with many pointing to disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=evaluating+limits+worksheet+with+answers PDF link annotation
    • http://icub.tech/xcom_enemy_unknown_android_gameplaytd01n.pdfIn PDF document text
    • http://merishwheelrecords.com/tozb5.pdfIn PDF document text
    • https://buzelobuledu.weebly.com/uploads/1/3/1/3/131397981/4168959.pdfIn PDF document text
    • http://itverys.space/vosuz9xwxs.pdfIn PDF document text
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/nokevoviw-mubofurudunox-gekujutevipo.pdfIn PDF document text
    • http://argo-tourism.com/gorajetabugalie6fs4.pdfIn PDF document text
    • http://wide-take.top/which_piano_is_best_for_beginnersi5o1y.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/last_cloudia_reroll_guide_bluestacks.pdfIn PDF document text
    • https://tarimewisu.weebly.com/uploads/1/3/0/7/130739021/doxikese-refikukuvadud-pagol-sezefidevusun.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/bootable_windows_7_iso_free.pdfIn PDF document text
    • http://help-ruleviolation.com/30474765819m66cl.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/one_piece_bounty_rush_apk_2019.pdfIn PDF document text
    • http://alisaborodaenko.design/81502006996sn5ev.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/nasibipotinizam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_2254c63bd17e43798eb863f4bbec9b9a.pdf?index=trueIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_372b4ed444f645d898782d086ef8d696.pdf?index=trueIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_f4abdda6dbb946b1a9ea7d747bc17764.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0f1705-100a-4265-ad15-2e011a442bc2/85335748395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374a7c9a-d210-4fcc-b3cf-14ab01ca29c6/does_table_salt_have_healing_properties.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25bc7dfc-4dbb-424c-a57d-1048a7cc3f18/enseanza_del_caballero_de_la_armadura_oxidada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbc2f37-ad0b-44ef-997f-56bdd00516fc/windows_7_operating_system_tutorial_free_download.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_off0000e5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FB 5272 bytes
SHA-256: 562c50642e8905750c7abfc67a4e1c63a366c537404057bb9e2dd7a54354b023
font_01_sfnt_off0000f7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 11332 bytes
SHA-256: 131d5ff3723609788e1b2d2b497d15b7e9b53f018a8064383fdec84867cc6cb6
font_02_sfnt_off00011f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F14 16236 bytes
SHA-256: b1345b03cb8ff90cb42c7c8f61cc0a97610ec8082568e26930ee59dd54284444