Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2946ce78781441…

MALICIOUS

PDF

96.8 KB Created: 2021-07-27 15:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0503c29e25c0307fd14072b9dffa1644 SHA-1: 915f5ffb35673ccf6d7552a8b9be21bd676279c3 SHA-256: cc2946ce78781441069f359814b292271834fae41104f7d8bceb2b6ecc1ac17a
164 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple compromised WordPress sites, likely to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links to potentially compromised CMS upload directories suggests a tactic to distribute further malware or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/j226664fit9ttupt70milo3rg3/90712613977.pdf In PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/74270702290.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/54814783919.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/2309022677.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091edf2c39c7---pipubigomifakesiduvufoj.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/tupanoposulegepi.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/55842bd0bb86f815afbd92814a561ab6/sunanerok.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076037ea979d---11016847873.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/74104074729.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9gvsb9ii4hpg6i9en25k1urno5/monulufamodefuxavaveluba.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/3ae40438757d737f3d9a0f9acf1bb512/55649321348.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/3560943346.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/akj6vvgo3aqg4ubgqth3l3kpbd/forenudaw.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/wobotubozafa.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/c7b411bd8620b8e4c5a324c0a41a3a2c/zurozabeda.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/992c8a3dac7a892d29fa59c51cd79ecc/82676486140.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cc83ee25e---13418798515.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1c26382c7---38918499135.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/52590616564.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16083c4747f80b---dokofuxukuxamemivojomemas.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/89020779534.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/74292475050.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/padebefowi.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/qft46pf7rm0j0uecr873djek7f/galajefuzuzok.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bf03b2829---48807637688.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=business+plan+dissertation+pdfPDF 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_off0001173b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173B 17520 bytes
SHA-256: 6e9066081d93f31aca5006c7c44f1613e3751b7f778014d5d60739c3584dbd65
font_01_sfnt_off000144f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D08 10644 bytes
SHA-256: 656cba8da2070544b2bfa0058e781361a6d55dc01d088e77875cd26b1ea689ec