Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6e8205fdfdaca7…

MALICIOUS

PDF

114.9 KB Created: 2021-06-30 12:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6e7c7bfd3ee1df626c3cd68b51daeb99 SHA-1: 5a153f9670f59f3ca20022472f8bfed8e9840c47 SHA-256: ac6e8205fdfdaca7ea668ac4576539e7c1d158213ccec3bda1eebcf77ecd9263
204 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of embedded JavaScript and a lure to copy/paste content into a command-line interface suggests an attempt to trick the user into executing a malicious payload. The document also contains numerous links to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://duetsepolno.pl/userfiles/file/tenoxa.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772fd2a1a35---sewen.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607630f4dcfc6---vapekabazetosegikipoku.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834b7c3c117---sekobivomakivamugajo.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/ae8823a0eeaab843d832736b65a1c76f/12409307748.pdfIn PDF document text
    • https://t2sc.me/userfiles/xivomabavakexulo.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b896b94969---refesisojogejaperapaken.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210626200717.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/rqna3a9b0dbvr0te1omt0sp539/sukedoxugarefan.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9a4f7aaa2---namigonebusemojadiraka.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad7dd33606---mibujavagikirivexi.pdfIn PDF document text
    • https://hse.tw/upload/file/72026735165.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/3869165343.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210508211323377937xgh199.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/19677592839.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9bf1040dc---61221771760.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/abs4v1780urrbb80ld1qg2b356/zaxogowuvone.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/gekejil.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da1a6eff95---8365413817.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/b7or2rce6313f9rf7r2t34o5ma/2364158300.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6194439e00---9787554882.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160863e6cc3daf---52400102211.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162387392827796746112.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/rojelovovujudikalavejugeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=tcp+ip+optimizer+androidPDF 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_off00014b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B87 10484 bytes
SHA-256: 3fef81a8715971506735ba4621493f27792bb59aa3999531cd7b38d37695436e
font_01_sfnt_off00016358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16358 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B6A 33692 bytes
SHA-256: f350cc50f2e5a7c42ac7b525aa21b3fdb936fef4a522e6842b5855a187a0be2b

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