Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae1ba529a522dc5…

MALICIOUS

PDF

77.7 KB Created: 2021-08-13 03:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f866d41afc29857e4584918d2b377198 SHA-1: d80566e9f095e8ec8cff636f32f0d52f4c9f5986 SHA-256: 5ae1ba529a522dc52156afb6866bbe0728bae82d3d39da304a7c9c6e1d673d27
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document was detected as malicious by ClamAV and an ML classifier. It contains a 'Clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for executing malicious commands. The document also hosts numerous links to PDF files on compromised WordPress upload directories, suggesting it is part of a larger phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fd334274a0a---14709846168.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607463b08fc8c---31562974200.pdfIn PDF document text
    • http://baove24h.org/upload/files/41817238788.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/liniwi.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/furoxinugonivapuvo.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/41922355681.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/sst6kttf4ibke5l2ncuqdi3823/38762399625.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e85d84a76ea---66072111671.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160864c15d7b88---wekadigukesazamuxisuvewe.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/24669430490.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/vefal.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/24390611883.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/jepulozidubapemozawaf.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c22dd8b2a57---39083461235.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/wipomominijosotagoga.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c546723e774---jexubarubilubirak.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/dowox.pdfIn PDF document text
    • http://grotech.in/userfiles/file/44819749835.pdfIn PDF document text
    • http://zlato-stribro-investice.com/upload/files/napamobegafemoxexewuwopef.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/moxonabulaxofafosowek.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/58014455599.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/51609582369.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c423751fff3---wotagix.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/kudukiwe.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/gumekupaj.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aba2a66f3c2---50459839799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+the+best+compiler+for+c+on+windowsPDF 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_off0000caf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF8 11104 bytes
SHA-256: 543f3da262a497abf49a6cc38bed7f022ccc92c5f043bf2fb5c579daf94ae047
font_01_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 16680 bytes
SHA-256: 89b1f045bd1d19b6e217fa598161f9e2e449518bcdd25c087a6ac785d4bc8bad

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