Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f22680135300ad…

MALICIOUS

PDF

79.8 KB Created: 2021-09-11 04:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 4bd7bf6658ebcb7d4cd0d8cfec62c141 SHA-1: 44aa319abb30ec58c585e53c485a66ffabfeeb09 SHA-256: a4f22680135300ad3eec7aa1ddc5c75ecad6270754fcc0ad54d1d542769a3b55
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=miragine+war+hacked+apk PDF link annotation
    • http://actinq.nl/upload/file/memadavugutoda.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/96898571873.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/68904339934.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/3839048974.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16136c903019aa---10929521116.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210906213214.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/51001310714.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/venavusokaj.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/73600661085.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16138a6a563915---sebozapef.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/jegoketozomurevulipijikar.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/bemaw.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/zarubonewa.pdfIn PDF document text
    • https://trexanh.net/upload/files/wumapa.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/vufapexa.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/fenomudigujulivo.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/31244589336.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/93738083919.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134edfa7c71f---84135632508.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/96160778023.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/94354621537.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/4486659835.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109080248512726.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000d03c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000d03c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 10532 bytes
SHA-256: 5dbcef3c4f334b8e9775c3890986749e7e0ad9d8ad813ddcba4bc548a84c849a
font_02_sfnt_off0001000d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 18364 bytes
SHA-256: c6888f6b93d3863bf523c97c75e788a4b28917dbaac0365f4d8d7a91416f8b8c