Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa47987e462533bc…

MALICIOUS

PDF

83.8 KB Created: 2021-09-13 12:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ced9a2b76fb1f3e419a8eb6c850f5eea SHA-1: 3ae930c6d602f798bc6d268c31b208ef1c0a300b SHA-256: fa47987e462533bccb4d21b89b0dafdd4664e85224018dde07c16b3e62c8bec5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a URL with 'goat simulator payday apk free' in the UTM term further supports a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://cructi.ru/uplcv?utm_term=goat+simulator+payday+apk+free PDF link annotation
    • https://www.htlexpress.com/ckfinder/userfiles/files/gufinesoxakisab.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d30416a80---pozerobatirir.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/39879419777.pdfIn PDF document text
    • http://xprchemical.com/upload/files/34668775323.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/kisotogu.pdfIn macro / runtime command snippet
    • http://wdnederland.nl/file/41841275964.pdfIn macro / runtime command snippet
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/jf6d5n8bk6iqt21lob0kf1ichc/1246001388.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/43925631958.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/zutufokevumubowu.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/54785820535.pdfIn PDF document text
    • https://bayihoki99.com/contents/files/86260561871.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/39815487973.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/jegun.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/65104276929.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/65422388915.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/rasojosemudatebapijupika.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/82123636243.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021090421031673499.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/31174172822.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/52306550698.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/19771562423.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89300548651.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/vogijubigip.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/27149422089.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/4a8ace4f665732c48b2742dac0154e11/kexiwomuxaz.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/tojupavizugodadesakeb.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136a9731e58a---78772000891.pdfIn PDF document text
    • http://wonikquartz.com/upload/editor/file/1630999323.pdfIn PDF document text
    • http://xprchemical.com/In macro / runtime command snippet
    • 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_off0000d8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 21436 bytes
SHA-256: 953c0cf9f9bc53e6e4023617545e55491fee0d626f93713a4c2b4e284d26426a
font_02_sfnt_off000127d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D6 10900 bytes
SHA-256: 0f3522f250c7d33c8a46a402ff734eb226da8c7ff556866baf23946e74ed6fbe