Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4663e54fd0a7a48…

MALICIOUS

PDF

85.0 KB Created: 2021-07-06 19:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cf6fa68502265cdb51465504400153f5 SHA-1: f2225f417be3720c76ebc54b844875ef20766c8e SHA-256: b4663e54fd0a7a48cc2b2e0c67331c07e85f690e41809d151318aaadad74d329
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, with several hosted on compromised CMS platforms. The document body is unreadable, but the heuristics strongly suggest a malicious intent to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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://bagiez.de/userfiles/file/6008588506.pdf In PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/dc724c997ca212385d5b7ed0e758dd04/95749641236.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcda135527---nunesepupasakitipu.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/38032322845.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/19010684213.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/af964eb640b02837ffa174fb50e9c701/92572087350.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a679ac8c3b7---dopitewajasewaxorupod.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/35fgecjn033rbacpqlrf8gsdr4/20932045415.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/98216238117.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/73965814479.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/pagatojamubadavasenoju.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/808919d81d184ff820f51d5934ccc0c1/wepitobaxipuma.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a604f61d32c---76813802243.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/auribiv5d8adqge2sa9jkc8qrr/10028775452.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5d58af29---74123768836.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/kosapodedo.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084ddeeaff24---13514629835.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/zezinusuboro.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/20534547082.pdfIn PDF document text
    • https://areicon.com/images/file/18389860653.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/41939293f887cf17f2c1d8cbbe3b4755/48084833549.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/j49u1nd4d9m60i14qmc4oq43q6/83763806798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+little+prince+schoolPDF 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_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 17888 bytes
SHA-256: 96da9fa7bf347f82dcefe5ac6b8bc5519376ad1a59b89a7cf79214f0ed51d31f
font_01_sfnt_off00011825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11825 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303C 10272 bytes
SHA-256: 0731dd46ce62e821742c2a2cfe53652ecc391f35bdfad886d47ab4d0f46364c4

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