Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcab2e0a8eacbcf2…

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 07:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c5466ba344b408dd2a08f1b26b8e0b71 SHA-1: 44f38810e5b4e7fc3b0cd7a1c357ab8cc18bb243 SHA-256: fcab2e0a8eacbcf2345bbbab027a0abbe80c86336c9f221fd49b095b23e4dcf8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the PDF structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f76d5a577---95078472703.pdf In PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02c76d782c---fusulu.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160812ec4b8572---tejolizuvufezopukavetuj.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/8242699126.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/lotelimeji.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/zewebebikuxoxutexutidi.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c062d259979---kunonawelanado.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/99398393353.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/6bcf4464c5133bbd9b54922de2177e13/39305046098.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/33016783869.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/15744573936.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/cnsa5kbg65pslj0o6tvd90pisc/demegu.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/30679457049.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/84725593643.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/45813065347.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/45516520594.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/ramopevanarun.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/77825432444.pdfIn PDF document text
    • http://abnicum.com/files/file/8387615014.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/raliwekalalutometap.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0d681446affdab64c2a36f54eb2dba9b/38699019988.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/gvbhbrbnaau28h8v39h7r7v2m6/64009356176.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/65800243888.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7d2a6eac---44339159096.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea494a162d---wikaverutewosub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=parallel+lines+and+transversals+worksheets+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7B 10840 bytes
SHA-256: dbcfac30e6a4daea2df0191afc650fe5965a6dcb05214cc336c0f51431b04f25
font_01_sfnt_off0000f873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF873 18748 bytes
SHA-256: b15233e80745bb7d991bda2a84c7dd4aba2e09ab60fcc2388de8e4796407c583
font_02_sfnt_off00012975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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