Malicious PDF — malware analysis report

Static analysis result for SHA-256 1deee702f015b8f0…

MALICIOUS

PDF

92.2 KB Created: 2021-08-13 19:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f35f95b5f81ab89a0779606e9f3b80e3 SHA-1: 9b747626fc1469c23bcc5fa2f3f51225c53ec195 SHA-256: 1deee702f015b8f020eb11b3dc37d24ff371c392676ce8bc5e455f0ed535aeb6
204 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It employs social engineering tactics, including a visual download button and a lure for a browser update, to trick users into downloading further malicious content. The document also contains numerous links to potentially compromised WordPress upload directories, suggesting a distribution mechanism for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c695ba3bb6---39779390589.pdf In PDF document text
    • https://ovalpolycoats.com/media/dituduvukowigalanuwisoj.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/d7704e6d63545bc1f2c6dd3e2054eba3/jagijejotajawun.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/linabofizarej.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cae89cc6d2---wasinozedilogixugobutijos.pdfIn PDF document text
    • http://goodmix-psc.com/userfiles/files/mogoxumojajinoviw.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///47570132501.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1bcb76357---78332074689.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/92674655236.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/gokozerixij.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2746c98272d8d76f3bdb7cbbc8f48287/99922209648.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/d7neta87gb8lhmr1matba7qasb/20090770861.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/s729pc1rdlvp4297crpguo03d9/74453302377.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/bcd48f7fa34da5df1dbafc4a57b815a1/24783321570.pdfIn PDF document text
    • http://yilip.net/userData/board/file/61359905399.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/68042695356.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16077ce7a4f809---59984629110.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f367a8130b0b68bae7641c13ef3ec6a4/jifuvimujeripi.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/46d6cfbd190b733db59425ac25c1d71b/80590176024.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/kojisupuzojanuzefunuxujo.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/jujabonabusukudeluzabog.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a237edd4bd---99947506235.pdfIn PDF document text
    • http://moristas.com/userfiles/files/39430422555.pdfIn PDF document text
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/6949490816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=ratatouille+full+movie+with+english+subtitles+free+downloadPDF 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_off0001026d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026D 17236 bytes
SHA-256: 351c559c0f2901bf799272db6b2ccab0d79116ca3b2c52d45df65da23a8a3e79
font_01_sfnt_off00012f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001472b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1472B 11236 bytes
SHA-256: a7cca750cdd323ccbf7b4d4448972ff578df56e038f43c7ead9eb1ffc3ca132e