Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcc3d7004b6266b…

MALICIOUS

PDF

71.2 KB Created: 2021-09-13 19:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5ae1a7ed0c4245c54c0f2d18b230f8e1 SHA-1: 9653af68655eca4ca3ce9b84fa0997791b25be07 SHA-256: 3dcc3d7004b6266b78fffbddcf969c9a5de0879a1ff0bfcd7aa2df0c457bb1b0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs, many pointing to suspicious domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the final malicious destination. While no scripts were explicitly extracted, the nature of the embedded links and the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/70372828333.pdf In PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/72690434915.pdfIn PDF document text
    • http://hkalc.com/userfiles/girexawujekodiledawinobet.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/95941279922.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/xoxoxum.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/4818717259.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308cc66a93c---26603381645.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/buwikiwizeden.pdfIn PDF document text
    • http://chemicalengineers.ie/images/jotesikolonuxukal.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/40586022716.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/jovuvebakaxomomako.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/75247354112.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/77677176497.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/23080881218.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/lusokotavovelijoxajonejof.pdfIn PDF document text
    • http://art-ball.net/files/file/marifanumuxezivawe.pdfIn PDF document text
    • http://floramarble.com/uploads/xozasugobataki.pdfIn PDF document text
    • https://weilmclainboiler.ca/fck_upload/file/sovoxasotiluvo.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/20977450571.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/48bed3ea7359650202379e04445dd092/30189805384.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=only+play+store+download+app+install+for+androidPDF 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_off0000b3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FB 10716 bytes
SHA-256: a52e1fb20a55a556a9c9ad3e61a6c86479d7546a5c93b6527a5a520293b7462e
font_01_sfnt_off0000ccd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E9 16772 bytes
SHA-256: b5864926f0a227c273f4d5dc76b641fa566d52d4984e7b1deeb743687ba44ced

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