Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25db2c8401509ef…

MALICIOUS

PDF

93.2 KB Created: 2021-08-06 11:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1194b9124a2040d8c50e7eb7f11ecf83 SHA-1: 8917af396ad1a0dbb0772e108aae34f0eb026c31 SHA-256: a25db2c8401509ef3c89b1f1106329d09e25ab9a6a315eb69ff36a69dc40df84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised or disposable domains, indicating a link farm designed to redirect users to malicious websites. 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 campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://infrive.ru/uplcv?utm_term=mitigating+circumstances+letter+sample PDF link annotation
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2fc9508f493dccb4a7b0a8121e590ae4/rowero.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/4129902109.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/sewadewedozixuxe.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/94997670367.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/5459eed0d4ff69f6da3a1faf55361450/76218460022.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdab699ffeb---13775094207.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/redorozesi.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210806155359074.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5560f1e12476f060bb5585a7debe1a43/rodoxuti.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/51566690973.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c827e30e3b---vafowuwosunafapabujuvakig.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/zewivupatebetorideloru.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/21668068768.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160713c3ca25a2---gesarutux.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b37ebdd002---49656151999.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tavomaxovamidop.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f6f9432a036492659e3fe21fddfcaf40/2562842028.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/a1tsj6vjq0jrss780gbfirqc11/79627665155.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/dadb05892b39b8a6980e8e01b2dd63e4/pexanib.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ed1047440---5141277512.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/23193809082.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/1df10fbd095de3a6369ba88fbcb27d26/mowowave.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_off00010a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2A 10692 bytes
SHA-256: 03706d1d8ad31ccaa2a71f188fef090afc0df6b2583f437bc898b91b7d1006fb
font_01_sfnt_off000122ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AE 16892 bytes
SHA-256: 3667161827edaa91bc040c1957208e4a20dfaae939ce7ae215c6d92e293d7dc2
font_02_sfnt_off00014e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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