Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e1788722d4df56…

MALICIOUS

PDF

81.2 KB Created: 2021-09-06 22:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3cf0447c8bdd765b3a397fa158003606 SHA-1: 9dd203e9a39c817a7a3164e619dfed50fe437d6a SHA-256: 47e1788722d4df5651fa4a0b83b65940b412369f38f53db0d9f80ce2c7577ada
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document has been flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to leverage SEO or phishing tactics. No scripts were extracted, but the overall structure and URL patterns strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://krisoc.ru/uplcv?utm_term=owners+manual+volkswagen+jetta+2008 PDF link annotation
    • http://www.agenbenangbandung.net/file/kawit.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4fe8699d3---wijixuzusenip.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608be01839421---27971783584.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/51305240404.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021072309494315.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161031a8843e5a---kogefawegukabaruget.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/zokirofob.pdfIn PDF document text
    • http://stonebriarranch.com/clients/876969/File/42030442825.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161117ec4785dd---66841910746.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/73960316246.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/gojozewovodedul.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbbb54939b---jofiwa.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/wexitimija.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/xepidamogunup.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160e61d691c187---2051365540.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/6ee19a89d217a84a9c2b5c1273237c34/40325143212.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/20581373877.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/sebufunonigu.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/pipavurelutog.pdfIn PDF document text
    • https://alutat.com/data/file/96154136205.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613507223e2b1---52109129156.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114e5ced98b2---3825446872.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/geburojo.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/ba8b55416c4038f56619a7f4f769a086/fujivoximaturerijeruruf.pdfIn PDF document text
    • http://www.520amis.com/upload/files/kimetalopalatow.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd659366901---nepozefuwir.pdfIn PDF document text
    • 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_off0000d519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD519 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 11308 bytes
SHA-256: fbf511669a290f187d853fe0d3aa317857aab87203f9fd09fbdd0d97c397ccf4
font_02_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 18132 bytes
SHA-256: 06b2f530a18e0f771dc7fe2c1b277c9e9ff595bc8be44b2376ebe0b7d6d7e5b7

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