Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c221f5b4384a748…

MALICIOUS

PDF

100.9 KB Created: 2021-03-16 09:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 52e8514e631ea6f75246f11ae66f296d SHA-1: 9903f31ef0a125be64ed064145f0e7c3d87d1755 SHA-256: 3c221f5b4384a7485cd4360fb129a4ff47dfbd64f26c83802a6854b88d4bbc54
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm with numerous external URLs, suggesting it's designed to redirect users to potentially harmful websites. The presence of a URL pointing to 'maypoin.ru' with a keyword related to a self-help book indicates a lure to disguise malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://maypoin.ru/wix?keyword=a+guide+to+confident+living+by+norman+vincent+peale PDF link annotation
    • https://s3.amazonaws.com/zunaporam/punjabi_badmashi_status.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/29413086286.pdfIn PDF document text
    • https://cdn.sqhk.co/dasotipamu/ja0Cnfi/podekibabutitadimutesifu.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/cjdeS5m/nanunajowudu.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/bOMkRgU/94141970488.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/2jcgcgd/43016119934.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/UO3PKtI/swather_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413701/normal_5fed2bfa90480.pdfIn PDF document text
    • http://migerov.xyz/pokemon_y_iv_breeding_guide5uojn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425760/normal_6032a1510c357.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/kingdom_rush_origins_level_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/lathe_table_leg_template.pdfIn PDF document text
    • http://pokupka.space/dolce_amore_theme_song_lyrics6plcc.pdfIn PDF document text
    • https://cdn.sqhk.co/pifizumux/kjd4Ck6/69731185419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_600e400a1a039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366630/normal_5fc867c354f09.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/disidupabub8t4gk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_5fdc4208f361f.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/iahaorN/pixexebegizufaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_bb673b9bb72648de8aa9b82eacfad7ea.pdf?index=trueIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_258fd6477b184424ad820cd8fa9253ec.pdf?index=trueIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_4f14b51510b74b329f1377fe24be1873.pdf?index=trueIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_9250b286b5054bc68576c5b40ffca169.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E04 5588 bytes
SHA-256: 19a7cbea4da8af293a3362f82e1865064ddfd7860e9a671b8e8964f4a13d0ca1
font_01_sfnt_off000140f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F9 1964 bytes
SHA-256: 4124f772d75de2e757d66273de45ab67d1472cce93aafc68bf24d7cdb8923c6c
font_02_sfnt_off00014a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A52 11076 bytes
SHA-256: ddf8d1f694fbe4ecce37d969985bc912a495c71662bbfe890ddc756e27a3d37b
font_03_sfnt_off00017049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17049 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189

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