Malicious PDF — malware analysis report

Static analysis result for SHA-256 2014149f3e68f632…

MALICIOUS

PDF

74.7 KB Created: 2021-09-20 05:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c1b1f6d58d18e2130ad75f04a97f01b2 SHA-1: 839b932da7a0223649ba14f54fa78c07302fc831 SHA-256: 2014149f3e68f6329caf9f9cffa7d4bfe7f23ed582dae078aa0e3c02cde53290
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=android+reset+default+app PDF link annotation
    • http://snabsz.ru/ckfinder/userfiles/files/49034103479.pdfIn PDF document text
    • http://thcscatquea.hoaiduc.edu.vn/ckfinder/userfiles/files/zovif.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/favovu.pdfIn PDF document text
    • https://soechi.com/userfiles/file/bibaveg.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/89130629703.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161353ac929c1a---dipemafulinipu.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613976ce1122c---42021335810.pdfIn PDF document text
    • https://beruanglucu.com/contents/files/wibijabuwizukaxurekevi.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/fimelufonarusixipoke.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/damat.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/69434665891.pdfIn PDF document text
    • https://davnosti.ru/upload/kukozibabawowadobe.pdfIn PDF document text
    • https://adikkedua.com/contents/files/58847176480.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/nowumu.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/xifos.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/37399677217.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/mafizakenoxulunipupakage.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/babitanapisijizumav.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/39587189172.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/donepamepawamodalojofese.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/69816866974.pdfIn PDF document text
    • http://cementfeet.com/userfiles/file/50224404057.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/nezinoxezuni.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/soturovoz.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/98962592702.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_off0000c05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05D 10572 bytes
SHA-256: a3d43578c7896de7dc974ad92470199dadd287bc24da236ac48e11030071fd84
font_01_sfnt_off0000d8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B6 17272 bytes
SHA-256: 1371faa46d507bc75e21864383a2a4dd4ee250330ca10259e12bd7a464889f4d

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