Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade27e7c53e5aeb7…

MALICIOUS

PDF

100.9 KB Created: 2021-07-25 06:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bb0b037715ec41fcea15fcbda45ac750 SHA-1: dc477504684d48edd66e9977242f97e13e9bfc20 SHA-256: ade27e7c53e5aeb7cc09355ab216c60810a67b03c5238ed9bbf09e5b1459eed8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the structure and heuristics suggest a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8fd61a5d---begatuzapafito.pdf In PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/82848613191.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/fapekifulaperen.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/dizutasanik.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/61377801232.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc868e7e8bd---97836527294.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/8752285726.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/vhhc806q3p4k6tlq2p4absoo51/zilaviminuziwowimopeguxos.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/68315758170.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/bulesegu.pdfIn PDF document text
    • https://fultoys.com/userfiles/niguratotoxosuzelobiv.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/4c2605b22c7aa13d3d2bcf2e037aabf8/61881350414.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c681ccc0c---79222409272.pdfIn PDF document text
    • https://cooperspick.com/files/27557034458.pdfIn PDF document text
    • http://aurora-c.jp/files/files/gixifazosepasarowotu.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/290d349e13bdac84d4f25d20876ab18e/mazunaruti.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/65127591921.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/65172bd232d449a152325c3559cbb660/luvakukanopalaramutokuguj.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/941543343c051803e155dc03840ac254/88651365529.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/561a1ce2fda003559b30d81f1ffc0091/niluro.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/91542a7176f92c729f8c5ca39e63425a/69864234050.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/laxowadolu.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cda12e3bba3---11064033425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=download+xforce+keygen+autodesk+2014+64+bitPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AF 18272 bytes
SHA-256: 598b573357b64bf7b6e15922bd346f2e4543573a48e578467e76adc52f164e00
font_01_sfnt_off0001507b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16892 11824 bytes
SHA-256: 1d5e6be91ce43d73292d28de42f1cfcbb48fc760124857189ab26b81dda22653

Open this report in the interactive analyzer, or submit your own file for analysis.