Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6e8d3b21075099…

MALICIOUS

PDF

76.8 KB Created: 2021-07-22 13:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: fa36a0900d725944a7656e6ef84770d7 SHA-1: 2b25cba318a5cbd28159cf61ccbef315e8dd4e5d SHA-256: 2b6e8d3b21075099c1795ab1194a3a6d2fdfb2ea8f2f44b5f7a5dd672a3e0967
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous URLs pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The PDF structure and embedded links suggest an attempt to exploit users through deceptive redirection, likely for phishing or malware delivery.

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://hglobaltourb2c.com/FileData/ckfinder/files/20210610_F78593327D3A54FA.pdf In PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a007fa03d78---rifazudubet.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/246bce02199237b9e8bb40768331b33e/popokikapekaraxalujew.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/wepujogewo.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/78461080153.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa073b58cdb---xojejejuvejunifuro.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/nugepuxiwizodupezozu.pdfIn PDF document text
    • https://33mobility.net/uploads/files/37563364891.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/xadopixewi.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a3616124a832f081bd8275ab7047cc5b/xusedefuloreda.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/vitaposejizuwovibozi.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/b53c106f85fa0bbdc0b1986137f27598/ladulepag.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11ce54f20e---9197908769.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/91486919366.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/tideperepajade.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/23094724945.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/33396824880.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b76c58364f---16402250891.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3999d56e4c---41620120131.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/rugavufe.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/33501819289.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/gk0cj1orlpatqbji7t7uan49ba/xobevatepibolutugarofu.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16075c294d547f---jupuwobovozupemonerareve.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085c37588081---bokuzosapuvemazobadefomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=odd+numbers+1+to+300PDF 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_off0000c94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94D 16288 bytes
SHA-256: ff3555e16fb369995f802acf32088d7ce9817e006ec24a15e613e39bc0f34d9d
font_01_sfnt_off0000f38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38C 10720 bytes
SHA-256: b7a958d3b61e9a3e74fb4f90e9e1fa3a13d6e956f6100944c3e0e6fd9d6ee5b9
font_02_sfnt_off00010c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1