Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a7951c33571620…

MALICIOUS

PDF

81.8 KB Created: 2021-03-27 18:55:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e707257686a9d66e61f4c512d9fb5789 SHA-1: 943259c806f7e4f52d968cd421f67005a27cd77f SHA-256: 15a7951c3357162099bf2e68e642c5f84cfe26628bcf2a1087d78f76f9f938b7
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/123?utm_term=perimeter+and+area+of+triangles+worksheet+answers PDF link annotation
    • https://s3.amazonaws.com/gapuruxumeg/bapurimulu.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/gdpr_privacy_policy_statement_template.pdfIn PDF document text
    • https://cdn.sqhk.co/rubalibuzodi/ibggii7/xetesexunebolexulapukepi.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/new_arabic_song_2017_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zadexona/T47hhzN/recipe_for_sugar_cubes_for_horses.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/hjehjih/lilive.pdfIn PDF document text
    • https://cdn.sqhk.co/fazituku/bgfidzH/zekodibaroruwuvifapi.pdfIn PDF document text
    • https://gegirugotosizuk.weebly.com/uploads/1/3/5/3/135397722/pajuxabobij_lolopi_tixol.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/74635350395.pdfIn PDF document text
    • https://bujubisagakib.weebly.com/uploads/1/3/4/3/134323903/luzelebivafovene.pdfIn PDF document text
    • https://wovuposekase.weebly.com/uploads/1/3/4/6/134613379/6448925.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/wabikotixinig.pdfIn PDF document text
    • http://zuxenegobepejij.22web.org/xokafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fd60cb947f42.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/9c6cb.pdfIn PDF document text
    • http://zavupefedeba.22web.org/tozere.pdfIn PDF document text
    • http://moxufelomewiziw.iblogger.org/56966747726.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/xidrCNI/39248972945.pdfIn PDF document text
    • https://cdn.sqhk.co/doburazax/eB4Nvja/easy_cursive_handwriting_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_600a5374ae99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_603eeae47069b.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/ibL6Qii/nuduluxeraretagaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493876/normal_60522490cbdc4.pdfIn PDF document text
    • https://ruzejome.weebly.com/uploads/1/3/2/6/132681971/ace90e41e15de3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadorebudinazu.epizy.com/vujunulelo.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_off0000ecb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB3 5476 bytes
SHA-256: 33b40263ee9aec909b630ee1dcd7895445fb81f09388c823e69e14e6044a7883
font_01_sfnt_off0000ff3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3D 10712 bytes
SHA-256: 9c34e3c1300951111df23988f40af9ad17d101b718d2a19af31ac528d82be3f2
font_02_sfnt_off00012441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12441 16196 bytes
SHA-256: d12ffaa940c15d24e471729ee5567d21a88133c29a2466b1fcf75c36d091922f