Malicious PDF — malware analysis report

Static analysis result for SHA-256 205c04a1f7fcc7c5…

MALICIOUS

PDF

56.5 KB Created: 2021-10-02 21:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bb72fe369e6c3d14f7152f95b418451c SHA-1: baa27b59e836a9fcade2dcd0565913263d72eaca SHA-256: 205c04a1f7fcc7c545dd8acfc8ed993bd28397222211e44ace8f30cd3843a88a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7106

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://huntic.ru/uplcv?utm_term=dipole+moment+in+physical+pharmacy PDF link annotation
    • https://jamisonfurnace.ca/userfiles/files/rapekogipadakifolasefaj.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/pukajugi.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/6819282282.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/33699277205.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/zomaj.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0aa04193b---95956132463.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/61d5660e2ad7573869bdff21462ef61d/72124513371.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/golimisoresun.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/76565949105.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/4631576401.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d7bca3dcc555646c8d3607a43b79879d/29360081176.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210910_AFF3A3027036AC0C.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/97727219014.pdfIn PDF document text
    • http://www.sunriseacademy.in/ckfinder/userfiles/files/52360014828.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/11463339212.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/57484881431.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/komobufikare.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/dafuselavuruk.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/rutexazak.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/mijelofeguvane.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/mukegaropurituf.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/vitexerikinadedaruga.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB04D 10752 bytes
SHA-256: fdd3f60a4d1ba51f5736d763fb691e4d11248de1a39e505427ba0e02428a7d72
font_01_sfnt_off0000c8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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