Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47dc2c7d2483400…

MALICIOUS

PDF

122.7 KB Created: 2021-07-22 10:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9837fb4d260f7ae10590ac0a9d1659da SHA-1: b300dc3d2c5b6097305e4944ada706687d22308a SHA-256: f47dc2c7d2483400b802460e05c6b0d9f9ab56855d0437964df2e49887828964
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure instructing the user to copy and paste content into a shell, which is a common technique for executing malicious commands. Several URLs point to compromised WordPress sites hosting PDF files, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download and execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e69ed24a7d---84727211413.pdf In PDF document text
    • http://stphilomenaonline.org/userfiles/file/9825256090.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160862c7acff69---rikefewixonelu.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9633bd903---wogusomewew.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16099b5d36082b---sojezesigikoki.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/kuvasiduxoroxepuliroti.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/wisidujejifazu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fd19a0337---89396345727.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/87780cc1b568ae15248509adab52f579/79871643428.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/6037b8ba3fa27e2832b31f68688df98a/25364533887.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/693664db92197c24df90032b163d6645/pumigaberifikajorafi.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/mupusexenijadijuxugil.pdfIn PDF document text
    • https://activepymes.com/pub/file/77712251222.pdfIn PDF document text
    • http://hydrem.ru/images/file/41272999178.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/tajezonozaguz.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/raseleduwutuf.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd63fadbc3---66196958710.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ce2b02a47---49298279459.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609529cb8df91---36268365322.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a33be50dc---76960230948.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/3e93501007dce612dec0c97a5dfe947d/jutudojawo.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/84a0e2d154882df373d6d0c2f7de4ab4/xiketulajejep.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/50920439396.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/70196167382.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cmd+command+to+check+port+statusPDF 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_off0001805b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1805B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19872 10864 bytes
SHA-256: ca92f28491c739a821ef97e10a8834b75623c5ff370583f8b0697e7479643921
font_02_sfnt_off0001b15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B15F 16604 bytes
SHA-256: 073b6181ce50e216d5e810059099ed6c044f3bb0cb9cfadc8339702fa34a2001

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