Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d27534bc78ac7d1…

MALICIOUS

PDF

76.8 KB Created: 2021-09-05 05:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e85068eda5ff3837fc7e57142d68d6c2 SHA-1: e01f57aca2bec2f79b638d12c455a5d8b98928d0 SHA-256: 0d27534bc78ac7d172df86806ae5fb2c682ce404d83b0db384e524e91a9e285d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://parquesanalbertohurtado.cl/ckfinder/userfiles/files/55516595345.pdf In PDF document text
    • https://t2sc.me/userfiles/40737616130.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/84592833270.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/l5ulkuvhsbp6v79ms08v0m5f90/476451723.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/42042987437.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/76239687849.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/e9ea06686ebd1589eb9fd1c995e492d1/xogaxajanalepuma.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160944378b2c14---varatatamenuvixuwod.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/08775dc8cdab4dca96c709029a03d6c9/tuvopudakogumokizava.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/mtkfsas7p0c0q7e512k9rgu2sv/pusatulurit.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/45754635667.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/bilebovaji.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/08288917c1dd60717ba3b0eed1653ea9/roremitinebawukeferenunen.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/zerenotexazuzazido.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e8dea22e---zilobeboba.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/vavirikasonebenebutaxape.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/41514328801.pdfIn PDF document text
    • http://tfforming.ru/d/files/ridegoseriju.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/0541fa623b29ff3ed402f8a4f20c0673/40511233028.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/aefa8755865a9107cd85576c58f20a52/23397855654.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/26235209625.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7c64d0028---904891647.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e58b6ef0d1a---88363252165.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/33130602372.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/pogefugifadelepilawafep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=stew+smith+navy+seal+workout+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_off0000c665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC665 11296 bytes
SHA-256: a1d0036e5a257f55d46d9fdb85f2a8ce59e0afd3c3334775dcc6d65f2c89b969
font_01_sfnt_off0000e0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C3 17392 bytes
SHA-256: 2ee5c40e48564ac56c78bf983c826b5608460a91c8be2347ee5a5bfe47d9831e
font_02_sfnt_off00010db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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