Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc97cbbc400e8dba…

MALICIOUS

PDF

87.2 KB Created: 2021-09-07 20:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eb0545f90af4c79de89297f3172f5f93 SHA-1: f00fd06f84d557612007acc2766d52a07468ac50 SHA-256: cc97cbbc400e8dba1e928a9939d16566bafc36a2d978db0c369c284ccc9ab3df
196 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan. It contains a heuristic indicating a 'Clipboard command execution lure,' suggesting the document instructs users to copy and paste commands into a shell. This is a common technique to download and execute a secondary payload. The presence of numerous links to potentially compromised WordPress sites further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/418a89dd1fb937684f7b0125afaa5232/74012175768.pdf In PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160bd51b44069b---1891432028.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2pd2c4k60ciroekoa8me01r3sc/37210318353.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/mobimozekimovomukeb.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849590ef15e---96683114508.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/limunirudevinoni.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052007222958.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/xegelebodas.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a37418229b2---62904342924.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/53705311734.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/47984340362.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/pesugodirazirukowinovaga.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/8a5ca164d5eb70b26eb3b5020d1232a1/lalin.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/goree7hctq70vc6fu3r3eo43tv/fisewezepuvofosib.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16087392043bc8---bipuvawukugujepalonuredux.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdb321195d---96655910622.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085406777a01---lepedotezifarisevoxibo.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/51219118754.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bcaf576877646377eea504cb60c07bad/95037749653.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/95754510822.pdfIn PDF document text
    • http://smakbyala.com/ckfinder/userfiles/files/zowolujafajebozexorowaj.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608630420d813---70391342049.pdfIn PDF document text
    • http://yongqingtech.com/d/files/bevaluneravuzuselakogigut.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed2951aa79---vikaz.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/80eab213745c25684a948baa960a20c2/91746398368.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160828e5ee7ec5---ribosadarixigopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=set+theory+and+logic+robert+stoll+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_off0000eeaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 17748 bytes
SHA-256: 3508ca7f18d0d42f666d92143fb613d6e7fd58f73844ef2eeb35f4d420fe502f
font_02_sfnt_off0001359e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359E 11228 bytes
SHA-256: 1a048afc0276ab33b3e2259a7e3c71de0bd6b9107429a2106f363792cf6a40f6

Open this report in the interactive analyzer, or submit your own file for analysis.