Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef688ce683e5bbe…

MALICIOUS

PDF

80.0 KB Created: 2021-09-11 12:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4a65fdf007121c75babdaedcb3817bcd SHA-1: b019b85414fdfd8648a92efcc4bec576f8d328a2 SHA-256: 0ef688ce683e5bbe61ff0d7a48eba02a1b700c16469a02663269a797e2c025e8
124 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. Heuristics indicate it functions as a link farm with numerous distinct hosts, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, despite some being marked as benign, contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5019

Heuristics 4

  • 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
  • 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://residenzaeden-albisola.com/userfiles/files/30886486942.pdf In PDF document text
    • https://martabaktelor.com/contents/files/wimukebif.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/6734102630.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/jaxevedozorogelis.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/2303018726.pdfIn PDF document text
    • http://xn--z92bzy85x.com/userData/board/file/mogazawizumijusiweliroz.pdfIn PDF document text
    • http://runhouchem.com/upload/files/xupelawofibig.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/46467487971.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/sajefope.pdfIn PDF document text
    • http://domuran.pl/files/file/vogowonuvovujuvozi.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/fanulaxovemuxobafizinim.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/57262979458.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/kabojupirexo.pdfIn PDF document text
    • http://calisnt.com/uploads/files/91977465986.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/80550566789.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/jiwedajibulonuvesokagid.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a92fbbade2---38341508584.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/vamumogumidun.pdfIn PDF document text
    • https://caraudioshop.ro/mm/file/58423277558.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/64709175534.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/44130857443.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/remiviruvibusira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=dark+mode+of+chromePDF link annotation
    • 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_off0000ec85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 18460 bytes
SHA-256: 050d2cbe8e6c5694a59b726bf720ff0dc529a169ae814053c3b9378bd118750a
font_01_sfnt_off00011d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D47 10324 bytes
SHA-256: be07b6289e09ab6b03f04968ea040c3949a4b6482c92c86b99d4985e9eb563e5

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