Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ceeb830e825f9b…

MALICIOUS

PDF

78.5 KB Created: 2021-09-16 08:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f0df159fd44ca439fde5dad91e62ab6 SHA-1: 84087f4c0809c3b8b101e7a4c00d7adabb3b2127 SHA-256: 74ceeb830e825f9b89f1273f2c8a03891a0d5cf16d47a23fe046fa3cd847c80c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism. The PDF structure and embedded content indicate an attempt to deceive the user, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://orthocarecentroortopedico.it/userfiles/files/bovoj.pdf In PDF document text
    • http://hooleihomes.com/cms_images/file/lovopafix.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/gosanevarerosa.pdfIn PDF document text
    • http://labotinnghia.com/img/files/22759607150.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/lilaxuvelazoluropobizafe.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/konelisenuk.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/rakuromal.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/fofalusule.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/17111672107.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/81244602189.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/xoritorali.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/zonuxe.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/12256177254.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/50789252379.pdfIn PDF document text
    • http://primaneighbors.com/userimages/wemakovuwezu.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/dikufetipesakixozebimopen.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tazug.pdfIn PDF document text
    • http://clingac.com/d/files/vuxaxafojine.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/59549817003.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/varuxaxa.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/86319027666.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614118e33c4bb---16975664813.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=phone+video+recovery+appPDF 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_off0000d0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AD 17148 bytes
SHA-256: c0822aaca51e7266d10994ba5ac4a262e3ffb0c1bdfefe53c28b9addd3e775b5
font_01_sfnt_off0000fd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11565 10480 bytes
SHA-256: a46cabf045ab0c440cce91a9c53b6f3acd2c7423acb4a6fee7aa7d47a42ddd37

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