Malicious PDF — malware analysis report

Static analysis result for SHA-256 53cfedb4dbb870d2…

MALICIOUS

PDF

90.4 KB Created: 2021-08-09 09:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7eb1ff4b1e870ed095ac11f4d5415e68 SHA-1: d6dbc474a10ab55c283821fc4c4d8304a213c72d SHA-256: 53cfedb4dbb870d20ad558f2981a5d5bd9732695c3a74819b91989f6693bc149
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c360c2e4574---59708397283.pdf In PDF document text
    • http://lpc2529.com/piceditor/file/24428422976.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/kemivegoterifuku.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/e98f0c3fa315998584c126a854b6d07e/82564093517.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/tedixabokudenad.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079d886cb0ad---1086445633.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/zemumidekorezeduteb.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b16b8ba3f3---dozav.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/lasoraxevavosifikirekoxi.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16096765b58810---rilupapemirus.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870ca98c4e5---81255880775.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160863b65a00f0---bonetinajozigikux.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/b35f589c7c2eeaf8d84813b61b6c8ffa/fovupijivajuxitepu.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c8e64819a---95221056735.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/lalanivopodovowetiz.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/50737535251.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/63273268948.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/45786353048.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5623a499---duduludatoguboxuxakenewos.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce8ae1374---10827968091.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/sejagadifizogafiriwupuka.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/a1fd02ea1be75669ac8299b22dcf8bdb/1132378193.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/54899690738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=baby+growth+chart+in+mother+stomachPDF 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_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 11024 bytes
SHA-256: 09c778af8178f84916d649de0f677980a4b964d4fcce62694f4537051cb70285
font_01_sfnt_off00011726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11726 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F38 17084 bytes
SHA-256: f58f70b5b9c6c4f2788ddfe13a29918dde69a7598c67c6592a6d278967b90ef3

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