Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e65011c5b4849ed…

MALICIOUS

PDF

100.8 KB Created: 2021-08-09 18:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b6ab982d86c577921892c375477d139c SHA-1: 2027af2757c4c277f1a4e44bd69cd6a8eb394aed SHA-256: 0e65011c5b4849ed137f52f00b8eda82c50b68f802631b2478366a91b88f3d31
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it contains a link farm pointing to compromised WordPress uploads and a lure for clipboard command execution. The document likely instructs the user to copy and paste commands into a shell, a common technique to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9692

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/5867156e780a456afb7fed7610143b5c/ferilexunivud.pdf In PDF document text
    • https://midasspa.com/ckfinder/userfiles/files/68155830824.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce087dcf239---74842038013.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/12340595863.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608256a795a84---15619821410.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/b558041ca163a831b28901d7e8ed8ae2/8571020595.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/nijuduwim.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/b739a40d28fc5bc3e1f69f12cedace3c/39619548277.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4e7b39693---4498400648.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160e7607912432---98361027139.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c38eb17e6e8---wefita.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bd3710b64---vumewafisupogagew.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608924e04638e---raluwudilupale.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/d6a408bab78e718b9678024498c4e757/winog.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/jugakoneve.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/44056577243.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/5a8c530b9f47df1830209b28434d3bad/fewevevubuxawerijazizena.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77275135d1---88918031463.pdfIn PDF document text
    • https://airshow-bg.com/file/xefigiwajinupub.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/lomujidavumepipidewevame.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094661cadf7a---puvazamurotewit.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/zolox.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/95f411a7d888de1e4ef0ba8c05705d97/dekifenej.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210730013250232.pdfIn PDF document text
    • http://rotarylaspalmas.org/documentos/file/papuwuragazefezujamataz.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/lafigubikeli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+remove+message+windows+7+build+7601PDF 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_off00010714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10714 21464 bytes
SHA-256: a9d6584f690be99fb0d97d05dd24e929474972c0d671283434b9ce78dd34bf0c
font_01_sfnt_off00013a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A70 16936 bytes
SHA-256: d52475f0cc77f75021c823f7434bc0f8c7ae6f0944def4266721a37b132a586f
font_02_sfnt_off000151ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151AD 11364 bytes
SHA-256: 55da734ea67c81a265be8e765ae7d53cdb6f219f039bf7b29d536b65c35a6091
font_03_sfnt_off00016c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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