Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9dd5f7cc6d0e98…

MALICIOUS

PDF

69.8 KB Created: 2021-02-20 20:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: fa96ded4a88b731d09271f10b5b43b7a SHA-1: 0a1fe6a540d9633f5bca44e10c6ea4a9c87ffe2e SHA-256: bb9dd5f7cc6d0e9805f9b710cb90d13c75890c72c77a96ac47bfa0a9fb4d6ec0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics point towards a phishing or malware distribution vector, likely initiated via spearphishing.

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 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.
  • 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://maypoin.ru/wix?keyword=fieldstone+middle+school+homepage PDF link annotation
    • http://tejifepubodol.iblogger.org/9812070468.pdfIn PDF document text
    • http://sewaseg.22web.org/descargar_google_chrome_para_android_apkpure.pdfIn PDF document text
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/wonide.pdfIn PDF document text
    • http://eu-study.ru/xawuzofizibiwazijemajur1y9ee.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/vamexunuburo.pdfIn PDF document text
    • http://jejarit.iblogger.org/zoreguxegagovuxan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458412/normal_5fc958f9657bf.pdfIn PDF document text
    • http://vostokzapad.su/wings_and_things_near_escondido_ca07c10.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/wetaxaxovi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fibejebovef.epizy.com/28530937631.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/mechanisms_of_evolution_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/darlie_routier_dna_test_results.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/is_the_sheriff_of_nottingham_real.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/panchtantra_story_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/savofobezagin.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/best_khasi_love_song_video.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_off0000d531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD531 5344 bytes
SHA-256: 072064e8572cdbd6ec88bb3af50cde03f12bbd4ee06bd3d9fa344af5528bba69
font_01_sfnt_off0000e73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73F 10304 bytes
SHA-256: ecd5ff3f23763e70d83b47a7716bd940e6ccc5ccbcdadfd0b673ec7b194a3a06

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