Malicious PDF — malware analysis report

Static analysis result for SHA-256 592cad184fef9058…

MALICIOUS

PDF

79.2 KB Created: 2021-09-06 03:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8c3b34a6dfa16faaca0d224517af5e41 SHA-1: b65b81a24a593d8507455d20e0d27a4352956cd9 SHA-256: 592cad184fef90589a956716985fa86011244c36e77599c1b06082896acc16cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics further supports the attack pattern of luring users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://huntic.ru/uplcv?utm_term=supreme+court+order+on+aadhaar+card+pdf PDF link annotation
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63499af38c---36363097862.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/74873809076.pdfIn PDF document text
    • http://attlas.center/userfiles/file/24561884312.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/zivegaxadaxovobizumor.pdfIn PDF document text
    • http://aprt1day.ru/file/89426093298.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/ribim.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/kulape.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c1599273376---losebifolubeti.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/38298576020.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/43389025006.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/vajadogigipusefisabojonog.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/fowabigoxavagin.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/punatogavuzilosubu.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/dc0d25c5bfedb88898fe5b7db4f18671/8257433807.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/64726512662.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/92052863162.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/5e60naautc2te2cki8a8dab6p0/93344872489.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e107e7381---mizaborarufepitivinobi.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/libavubeziza.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ffbc2fe44---luxikixagina.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607808937d3b1---84793736491.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/tohhab0jbvel2s9esqkk63q718/60841269119.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/lutivigave.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_off0000d281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD281 10756 bytes
SHA-256: c1c3ba8a5745ecd69c576bb3dd938e6df7c88d05da6fd74b4fb7e1675a80b6f8
font_01_sfnt_off0000eb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 17092 bytes
SHA-256: f937ca068b3817c0977ebe851d44b243b6dac45e5c706b4ccca073412ca5b187

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