Malicious PDF — malware analysis report

Static analysis result for SHA-256 60db92606939c3e9…

MALICIOUS

PDF

82.0 KB Created: 2021-08-05 10:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: df94e76cc74ec79212e01794f39f684d SHA-1: c2dc6c1dfe24499c9b9c7d2048bad545b1327491 SHA-256: 60db92606939c3e91ef7eb36d41d5e7b54544d869d6f0df2ab2d1b7811e185b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm or redirection mechanism to deliver malicious content. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests it is used to facilitate phishing or malware distribution, likely via embedded JavaScript or by redirecting to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/ec4854bd60b59deff2db38d560c56e5b/kanofet.pdf In PDF document text
    • https://anhhuynoithat.com/asset/files/gukipop.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/d00ef7fd9547e556b54948b4b1a32f0b/nuzevazum.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/2359b23fa5574832cc3e6501667549d2/29055914610.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/81799932928.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/vavefanerojara.pdfIn PDF document text
    • http://solac.nl/app/webroot/files/userfiles/files/35768287295.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/7a0d145646a6c06b6f57ae934d43879c/lokobarozojelukogi.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/latume.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/64333073279.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/7fe8df1786149611858d901251b723ff/78157534188.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/womivim.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/gazuju.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5bd451173e---niwawirawatufowolajewanew.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/meidultk0ucds2seru85vh5s9r/94070149166.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/rb7f235hvp81e0qenkcqku1p20/lonajagonujalufew.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607745b196a75---dukifunos.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/67166788001.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/lesotebiwetad.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/siporexabaji.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610411be5f060---65166300889.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/jibenepirijit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=las+48+leyes+del+poder+pdf+para+descargarPDF 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_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 18348 bytes
SHA-256: 92c93999cdc421501bbec9e69ad2b050c4aeb4e2056fabc8397fe501ebb2a5cb
font_01_sfnt_off0001088e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 10856 bytes
SHA-256: 0ead8506c047210464fd25806810f86308d49715b8a60395d7f13faab7f74f8e

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