Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f732bff35b677f…

MALICIOUS

PDF

80.4 KB Created: 2021-09-05 11:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 76d542a0885759a2eaed5ed0f8c0844d SHA-1: 3f974db8740873d78d854ccd2acbf69cdd87caea SHA-256: 80f732bff35b677f3043737f6bc40ce429d36d872bccba7a0a33cad682961662
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and URL patterns are consistent with link farms hosted on potentially compromised CMS uploads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://havadisname.com/upload/ckfinder/files/16898965332.pdf In PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/84851501335.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/11123014242.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e00c4e3d25---96241165648.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/81163c36fa2e18c771e3bee3b01baf9e/19632985860.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/wixopemurukidugemo.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/bulosegozili.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/razufakezipit.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021071014173673499.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f22976bfa5e832b5956a05f705e64060/11239933543.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f970262645---wobalalesudonalepimiviba.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/bakilididotunepukanexame.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/68376671534.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/jilike.pdfIn PDF document text
    • http://moretonassets.net/userfiles/60168561752.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160ee045376d45---19503052037.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ifqmuffudjcss84fu7i75k1n3d/33917858402.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/xuxosuximikeludo.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/veruvugasuzofubo.pdfIn PDF document text
    • http://eksternest.be/images/file/gekirafekijofel.pdfIn PDF document text
    • http://limoride.net/gallery/file/xulusabomivanijudugibolu.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/gizaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=prueba+pericial+en+materia+laboral+pdfPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD575 10856 bytes
SHA-256: 9d6c75a5e8d889b80c17b73c1e41a997c6d4b7d18c7c48ca9c9379cd7c59dead
font_01_sfnt_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 18148 bytes
SHA-256: 0ab1e0415b520de83433a94eaa8d2fa1769c949f41dbf153e2c7803d211cbf69

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