Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f7262f0c1f72b4…

MALICIOUS

PDF

116.8 KB Created: 2021-02-22 19:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d1dbb5191f2e0a7ae8e822ce47fdfeb1 SHA-1: 0f4ebc641531c4ddb4037fdd98c8e41f80d07646 SHA-256: a3f7262f0c1f72b45045d7b2203017fc249059ca803f09e58b78dfad1d0c89c3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs pointing to disposable hosting services, suggesting an attempt to redirect users to phishing sites or download further malware. The presence of multiple external links and the use of disposable domains are strong indicators of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/wix?keyword=%25D9%2585%25D8%25B1%25D9%2588%25D8%25B1%25DA%25AF%25D8%25B1+%25D9%2581%25DB%258C%25D9%2584%25D8%25AA%25D8%25B1+%25D8%25B4%25DA%25A9%25D9%2586+%25D8%25A7%25D9%2586%25D8%25AF%25D8%25B1%25D9%2588%25DB%258C%25D8%25AF+2017 PDF link annotation
    • https://cdn.sqhk.co/mifigatira/MhbN1ha/balance_sheet_format_in_gujarati_language.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/ruvijos_dariwu_vijosop_zipomo.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/m3gewYW/dasoxopisadoduporirepaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tireronerogo/byghjdX/95388218991.pdfIn PDF document text
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/2677602.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/YPYTiiz/braveland_pirate_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/Akjebjd/xekelutinusisujub.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/07f3bf6e894be.pdfIn PDF document text
    • http://hellesypakk.online/marguerite_duras_livresjp5fk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_5fd7ee8e7b16d.pdfIn PDF document text
    • http://aycotoro5.xyz/reversal_candlestick_pattern4br86.pdfIn PDF document text
    • http://2220202.ru/samsung_un58mu6070fxza_review1zjxa.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/iichajd/nudoxaxi.pdfIn PDF document text
    • http://prazdnikprosto.ru/macy_s_at_pentagon_city_mall_addressizo6q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465935/normal_5ffdf4aedc34d.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/JijjfuY/kimepomodolorikefitevaf.pdfIn PDF document text
    • https://pelabinal.weebly.com/uploads/1/3/1/3/131379552/129863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_601b8fe5829b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448985/normal_5fd960a91e65b.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/fHJJhhY/mx_player_apk_android_2._3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000189d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x189D6 31668 bytes
SHA-256: af1bcdc7ce2eaaa38415139bb816f630731fcd2ef0cffe5a211f05653bd63884
font_00_sfnt_off00013cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC0 4472 bytes
SHA-256: 0499ec8a32ffbd3e1abea6ab3ec8d7f555aa0cf90767e23d906692dd2ff290a5
font_01_sfnt_off00014c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1A 10020 bytes
SHA-256: 84f95bedde2e695ea314050a3d41ed91b955b4894bed161ced58f85c8eeaa133
font_02_sfnt_off00016edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EDC 17892 bytes
SHA-256: 3dc678ce68d8d30213043713ee7f18a6e37e755ab047fbc885c8024d29aa6e0f