Malicious PDF — malware analysis report

Static analysis result for SHA-256 8350b6958898f24d…

MALICIOUS

PDF

71.8 KB Created: 2021-10-02 15:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2f8f1f5215deb140a59312bbe0836a30 SHA-1: 268daadc047713b0e797f3a3f8b11b5c8e7ceb6c SHA-256: 8350b6958898f24d3081bc10e2f3b3d132d1ae7bba5c2f732689bbb9bed5dadd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous embedded URLs pointing to a link farm, with many leading to other PDFs. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of disposable hosting and link manipulation, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/22043715655.pdf In PDF document text
    • http://minhledtran.com/luutru/files/fodewaxopilaj.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/jutolusirokutigumazevap.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/wugugimekiju.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/31344279633.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/juguxax.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/murigokadejatubazuwewumox.pdfIn PDF document text
    • http://csc-027.com/userfiles/file/20210921054741_gmpk3c.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/2172182179.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210928011240.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/71360118913.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/b2m8rfa50q4peonf26k3cbnmad/62931250056.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/30816270814.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/joxawoxejo.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/53764938266.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/vipumabelufenu.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/40970476536.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/89324939820.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109040842426285.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/1185149f6f9dd4aa1e9d60db1f56cd02/jagikinu.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/72527569253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=crpc+prostate+cancerPDF 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_off0000b3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D6 10260 bytes
SHA-256: cfeafe2b15da66c9157dfbedcb5f76494226255f33de43dcb6680b2daef1b6dc
font_01_sfnt_off0000cb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0F 18272 bytes
SHA-256: c511d688a31395ed66f7c65ee20a59ce635cd63ed2a32143146a819630f1671e
font_02_sfnt_off0000f9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.