Malicious PDF — malware analysis report

Static analysis result for SHA-256 220cd9e3f4975e02…

MALICIOUS

PDF

85.1 KB Created: 2021-07-13 12:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8950cf9e70df231fd6e497a94e72f6e SHA-1: 1ca0612d55d3b3152465cef678e56bd989949a74 SHA-256: 220cd9e3f4975e02bcee0c876fe9fa9a9469627e1ffd8d8f059d7b23f171ff88
156 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing or malicious redirection attempt, as indicated by multiple heuristics flagging it as a link farm. The presence of URLs pointing to compromised CMS uploads and disposable hosting further supports this assessment. No scripts were extracted, but the document's structure and embedded URLs suggest an attempt to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/74870231125.pdf In PDF document text
    • https://fairtradeportal.pl/userfiles/file/vosuruvamalunivonevotawiz.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/samaxawonizujik.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/86536790317.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/85904315728.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/bivepozojafelel.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8108926c50---93351440315.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/zitasag.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/rizofa.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/69952683540.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/30019804103.pdfIn PDF document text
    • http://deckdreams.com/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/54346192034.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/22322741483.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/48225227043.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7adae1dc6---wozujokudu.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/95a04d9485d89771a7ece8c2655c003c/raboxizexoxebosokovo.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd89be0877---31524858982.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d5d87d2be8450602b60b0c08fa83c3bd/diteronanaxizi.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/35497100543.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/4822439016d1c0be599ffa68b94f8654/47799647399.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/neguwu.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/zavabifexotedu.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rogakegokapefudowegux.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad893646904---23505743484.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=is+sweet+and+sour+chicken+bad+for+youPDF 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_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 11012 bytes
SHA-256: 150604a5ba8933c09418a24a6db1a8934237d26a3613f48aa8574cb6139e748c
font_01_sfnt_off000102eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 16948 bytes
SHA-256: f0b7e45df49bd69c5fc8c28db8e622ab1a59ba2401573ca18d7563ce8cc0d70c
font_02_sfnt_off00012f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1