Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2b708c4f804dbc…

MALICIOUS

PDF

77.3 KB Created: 2021-06-30 09:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d770e60f0f5d584e788a67d287db553f SHA-1: 89d84f81d83f18d9ae8c1fc8cdfbfe79b7f5c9f5 SHA-256: 7e2b708c4f804dbc2124235c29a9ed7877656351ba5e7afa83fb022a732c4dbe
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c11d955148---wovajagozagezuxexevalebid.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ae5938dbe---xowapolejan.pdf
    • http://faxik.ru/ckfinder/userfiles/files/30760408857.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/27e5e39200030147c5dbe40065ae3151/malapew.pdf
    • http://mmdplus.com/userfiles/files/20210616_034854.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/xopoginizefubutaxolewi.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d7974cb20bd---gotepimowuno.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/ek78tp6h2qquki47jtor6tv3ca/pasiso.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/vabatubuxodobo.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d28025b3919---23146855249.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc972ea7e6---dafilupotibenudomu.pdf
    • http://chrislahoda.ca/userfiles/file/40795647510.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/ed0331e68fc1fe637460d224cebc126a/74736696856.pdf
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/tuxarabusizow.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49c0601761---xezuzisedogaw.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a3f78a87b---novawavi.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160976bd66d827---41263318118.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/spjqsgk5qkpp15pl40fnsenkrh/mixarajimaneludopelik.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/7c638c292ec170b98e91dedbc8705697/58693259553.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/74b4b42652f4834392dfb9741563c0b4/pajitasufujapuv.pdf
    • http://alliance-ltd.com/userfiles/lezarev.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/df5930c11454b1f34856fab9ecf15b67/25477879302.pdf
    • http://andrelandberg.com/userfiles/file/vivesodadagalafirel.pdf
    • https://llsindia.in/FCKeditor/file/2590373569.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=what+is+a+pulley+in+physics
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdeb.bin
740041baa60595396bb10ae87065d722cbbab7b4428c85153a6e11902d958fab
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEB 10456 bytes
font_01_sfnt_off0000e5a5.bin
9a3e6e2827f2089228b3ced3406c80d89e533718593115decfaa2b14e47bda60
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A5 16268 bytes
font_02_sfnt_off00010fd6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD6 16792 bytes