Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7f2e9391ab4890…

MALICIOUS

PDF

93.7 KB Created: 2021-07-26 23:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5b3bb7f64a25ca8fd185d41be4edd58c SHA-1: d5e25b0913940fb73b319da981b6815449fb5c31 SHA-256: 0e7f2e9391ab4890f3b06d6c63663cd525dfd4138664065291f3ff1b97853b7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users to download further malicious files from these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/fuccf6qukh0ipbf416pulsvt9q/kavusanonubotulokununegam.pdf In PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607568f73a932---8930968443.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/7a40e8b37fbb3a8a4a55fcb958d81a9f/25413187491.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/lawew.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/4cfd2eb4d56d159d63e1b9bc18e46483/60077224172.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608573ed7607d---pomaga.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4044ca8d5---31993923656.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/d1gttu8tg4tpa7j2qcujo4ilpu/fizopozazekakesukobetog.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/55654157466.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/27992009889.pdfIn PDF document text
    • https://ei-hotel.com/free_images/files/migisokurapomukaw.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/kenubiladukalujuzina.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094391e3df48---lepukiduzuluxal.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ff625068d.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/beviziluxarudekazeluzut.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/femipobuzexu.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/32542737435.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/77078779976.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/92827124671.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021062317212980554.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5f7a1754b---56792653624.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609469bc9786c---wideduwabesomirot.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e90e87f091b---pugimozigovomo.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087da18341ee---27850897021.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d074bbbbbc---12856651324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=opick+mp3+full+album+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001013b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013B 10900 bytes
SHA-256: 229fa6e7729147c186436d7ee71c2de22a3625d5db9d3a44316cc79d0d3b9cd5
font_02_sfnt_off00011a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4A 17160 bytes
SHA-256: 5cae0669277f7973f7a55401c56a461bd7c9b767818acd2736b9314ffcb33de3
font_03_sfnt_off00014781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14781 19372 bytes
SHA-256: d7614da9ccec42eb875a201d2bed839f5817c76ebbf79496f5096c2bbffb09bf