Malicious PDF — malware analysis report

Static analysis result for SHA-256 700103a772b284ef…

MALICIOUS

PDF

66.4 KB Created: 2021-09-23 12:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 483b0232bbe12c837371a7eb1f782f29 SHA-1: 699d0dc0c09ea0dbad7bc0ab9bacf9d42df05c5b SHA-256: 700103a772b284eff1687a078b940c51272e492444056bb119c325652622e025
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8566

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://robert-zauer.cz/userfiles/file/11637821796.pdf In PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/zisakejavijatadororobi.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/47198254961.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/luxovaket.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/jufaxerefefedibabotewofet.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/69228279393.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/xibirugevomugorejopofi.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/31786193532.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/71976311593.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/63541765225.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/wuxugozitisonusugezowuze.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd34706cce---vupux.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/sejaluzoku.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/92574792450.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/puxiwexekupabed.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161402f640fca9---zopobomo.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/kosikos.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/84828431867.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/f2i9s8sk1nfomjahdrh6vpvr97/22624859587.pdfIn PDF document text
    • http://stroykap.com/application/views/stroykap/userfiles/file/zewabozadijozufujazurosar.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/c8b33iri572lu0gsnvf4p5lim3/nadopomujabakefebenipevit.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/62037664224.pdfIn PDF document text
    • http://thietbidienmpe.net/upload/files/nakomigajif.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/p95upcr3aghev6g4hj76p1a6ug/49029375959.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/tobixojelulenemamukuxub.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613fedf2999b7---fidamozomoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+delete+photos+from+lost+android+phonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD210 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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