Malicious PDF — malware analysis report

Static analysis result for SHA-256 124be925152903d0…

MALICIOUS

PDF

98.7 KB Created: 2021-08-31 05:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 80254bf33f3504cd56ff6cb708ef2cd0 SHA-1: f4d130e8d7a902450867435f665fe4e1043d20a8 SHA-256: 124be925152903d0211d02fb95d32f27262c08d6faa66fd56d5838d7de742443
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting vulnerabilities or delivering malicious content. The PDF also contains numerous links pointing to compromised websites, suggesting a link farm or phishing lure. The presence of embedded JavaScript and external links indicates an attempt to redirect the user to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=when+was+catcher+in+the+rye+banned PDF link annotation
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0nrkuudmskl69e4n5usrd48pdg/dakofejurakutetelus.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f53564aa2f4---xuvevopubadimutidedofiza.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795ff6d222e---nipida.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/zanitulokijevekupanad.pdfIn PDF document text
    • http://signauction.net/userfiles/file/63032382975.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/44951795400.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0acec95db6d6e87bc389e85ec5e9ee92/jofelaxok.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/bivivasovugupebakoro.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bafcb768771---xolimajilil.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/fuwusogupewurakudofawuzat.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/92087914896.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/xikisuso.pdfIn PDF document text
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/81475264712.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/88047947322.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fccd29a834---62633005759.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/oinh1sa0mfqcir0fdeqspajf4j/3882147638.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/toxepomavuj.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a82d35ce49.pdfIn PDF document text
    • https://labelmarket.pl/data/file/10490601971.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e203cd9c50---vimowotuwagavidaxepek.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/vuwarenijuguxodesazar.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/tibupov.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/16014602932.pdfIn PDF document text
    • https://akemi.ro/hirek/file/75580339064.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c3831cc6f---topirexut.pdfIn PDF document text
    • 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_off00011c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349C 10636 bytes
SHA-256: c0b7b8bc7031fd7355cf014676f0916ebe9ab731dbd680409ac168348bfea4ef
font_02_sfnt_off00014cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF4 18200 bytes
SHA-256: 10f800851a46e140aefd6cfe04e03763c6a0fa00c1c39fc940d65b2daf873c95

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