Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1dac97a77a0380…

MALICIOUS

PDF

81.9 KB Created: 2021-09-20 00:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 345449ede867fbd8101f00c6466e426e SHA-1: 3aafa9143ac63d21333143beddd29675de885bc2 SHA-256: 2c1dac97a77a0380336e2ce92036fcb2fe9f0e3776a1e6defb638248decd00ec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://koratspring.com/upload/file/90602154534.pdf In PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/jobazelejopiwalafaposiz.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/18003919268.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3012a9ad1d1502f9c719f20f9808aaf9/6565025354.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/towuduri.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e98f6b79e---vajowefakepavujaxobubuje.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/25362107028.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/13838253790.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/44164671844.pdfIn PDF document text
    • https://fotografski-studio.kost.si/userfiles/file/88129108659.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/64101559271.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/34034382126.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/pudivuliwinujenona.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/89564562218.pdfIn PDF document text
    • http://svx.su/ffile/file/81666126749.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/54039739569.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/duwekaturozorixonejazuw.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/29951498711.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/dilosuvesipamowogofuvekof.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/zipitej.pdfIn PDF document text
    • http://hongdacable.com/d/files/dodalejuriko.pdfIn PDF document text
    • https://deverfgrossiercms.deindrukdemo.nl/upload/files/bavofadesugizilupiwadufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=john+wick+full+movie+in+teluguPDF 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_off0000d65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 10688 bytes
SHA-256: 61acfd862d839c7d84b83e791fec27c7707c7154f567a5c7629718ad348d1124
font_02_sfnt_off000106d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D7 19756 bytes
SHA-256: c4c194d89a74f5fee1a4dc806b6177c0dc77f569ae6c96316ee7b2ebf49853e5

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