Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e453cfa57bee58d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 19:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a6cfcaabe598c76638e6b0e0cf805d7f SHA-1: cae2bac9c6a48ba5019008ecdc41488dcd9db9ba SHA-256: 9e453cfa57bee58d545086655495fc636095376910f6c28693ae42a8d2fd5961
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a command-line context, likely to execute a second-stage payload. The document also hosts numerous links on compromised or disposable domains, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://tryinvest.eu/userfiles/files/53315904811.pdf In PDF document text
    • https://contemporaryteas.in/admin/uploads/file/26248959085.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/dadurix.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/47422596061.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/59792234883.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/numumivisalazu.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/dupinafusosuzodexowetoxu.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/xepunikejiduwovedapijizor.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0d971f6b3f42fcbca654b582ff86aafd/34766866901.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/33126287110.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/20408189171.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/11faa7d7e762f7f7a80a316aa7506dd7/11424864249.pdfIn PDF document text
    • https://nada70.org/userfiles/file/93918547828.pdfIn PDF document text
    • https://happyjourney.webtrails.in/ckfinder/userfiles/files/40123361507.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/mevodudofibigisa.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/papifakoritekinofemugaxi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eba772cfdd---63561301561.pdfIn PDF document text
    • https://harom.ro/files/file/wigepanejamugizebana.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/47190404442.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/gugibotututosu.pdfIn PDF document text
    • http://airzo.net/userData/board/file/70429756753.pdfIn PDF document text
    • https://gift2goa.com/ckfinder/userfiles/files/kadesuvozavawabisosamav.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/58363906840.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109071035263833.pdfIn PDF document text
    • http://snkpost.com/fckedit_file/file///20210906_9_10_23.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+screen+share+my+phone+to+pcPDF 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_off0000d924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD924 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 18144 bytes
SHA-256: 925d8174369649f6e4029f524dae68f8226d216399ef166a22935a12fbd18527
font_02_sfnt_off00012097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12097 10692 bytes
SHA-256: 6b7ea8b7ba346f7d8dfabbbeb64714e82dc976e1ddabed779a7f56cf1848a9f0