Malicious PDF — malware analysis report

Static analysis result for SHA-256 f417be2d5f226ca8…

MALICIOUS

PDF

126.8 KB Created: 2021-07-07 06:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: afa94a5d72a1d4b81b0244daa32e3f80 SHA-1: 82d9570ad475d9b9fb5a9c709fc279e357af615f SHA-256: f417be2d5f226ca8fb71c9d5dc88afb3633a4b07c0110864373768a3dd49064c
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to further malicious content or exploits. No scripts were extracted, limiting the analysis of direct execution capabilities within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a63690dd82e---96793202596.pdf In PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/fopafasakelominegagajoz.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/95516811729.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/92187e27917bb38238b3d18be5da08c1/94518437342.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/db9206af355bd64e1030d5ca777f90eb/fapagozusu.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/niroxejabago.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/59c73ce0f022e17bf924b13521ddaa80/39143145531.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210531_A7873C5BDF1D4834.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/278915397.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/mazulidekitivamodenejanu.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/0ae5f274bbad6442e6009118f1ea7685/47096449094.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/zuladu.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085a042934e2---50667712113.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac04d3394ae---lutoxa.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/b39d460360f334fd9e69c31376407a4b/nopowosewevuxasamutepiro.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/39644248858.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6b39bd0c5---91934994779.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/xozixatofuvajukuzel.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d73472cf66e080cb48e978007a9c12b9/nabaxi.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/74021666275.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609da3bdbed4e---24350440157.pdfIn PDF document text
    • http://remobudostol.pl/pliki/dakaduzikiwinatut.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/nopapune.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/vibejopazoguzugukudawa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=narrate+meaning+in+malayalamPDF 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_off00018f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F98 18244 bytes
SHA-256: d5be5e63444e1f3b90d012f7e3ea25b0622eeb6e270b4206e602b6622d239a74
font_01_sfnt_off0001beef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEEF 10252 bytes
SHA-256: 0debe7579977c97212be9aa4c30b4aede9a3b20ec1414c22d941ae1c3df9fe3d
font_02_sfnt_off0001d5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1