Malicious PDF — malware analysis report

Static analysis result for SHA-256 468f5806d095ea68…

MALICIOUS

PDF

110.1 KB Created: 2021-06-16 12:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d6877bfc6b87be66a4b7026c663b4029 SHA-1: 3af27e40d5c8d75b9a2ad4710a8e8e2c31296661 SHA-256: 468f5806d095ea68d2b71f725ec4e8d5f3c92fecce4e085ff76949554b1cb1be
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates potential execution of commands within the document, and the ML classifier strongly flags it as malicious. ClamAV also detects it as a phishing trojan, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://wastran.ru/uplcv?utm_term=encyklopedia+psychologii+szewczuk+pdf PDF link annotation
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834a694b288---begalokinomilolopavewa.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/pitukezajigawozademijetu.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/e04539d1bc20b8779f577c240d13cb2f/tovudunagelenol.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/3qkm3l5s5v1a2f8pjrdsp46110/88729855967.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/kifodaxawegokexemitujenij.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/nakoriduk.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/7fd0f94ca01b487233273d8bb863d351/weluruvodaxotogagalan.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/dokowiwebidevex.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b281a4e03f6---wawenopoginebofubabeg.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076501e96c65---7971602110.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/p18senkdb7sv5ltrng6hp1vs29/fewodu.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7659e5f9c---fosejuj.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc0aeee1aa---zixoranoko.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/3vi8vbtc2k3i2vb5a8ve2mi8g0/74665089750.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f6fac7b44---29269028745.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0001551c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1551C 5584 bytes
SHA-256: 2dd1bef08179b122865aba0e14fd82eddb201c8be542d4ecc12799a8090ce104
font_01_sfnt_off00016859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16859 14836 bytes
SHA-256: 6d0a38b954c6f2d339388d5b978a90a1fc8256bdcb96b6ca178bcb10b22a844e
font_02_sfnt_off00019420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19420 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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