Malicious PDF — malware analysis report

Static analysis result for SHA-256 69700b8bdc906584…

MALICIOUS

PDF

64.0 KB Created: 2021-09-19 02:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5e651bf6581e4e83a5929561ad78a499 SHA-1: 2bf8c3b7a9f903bfa3895f56e722093131f72a29 SHA-256: 69700b8bdc906584c2c785eea511e1c9daf2d161ed856c9e188313ed49a3abdf
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

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 http://nemdanangpho.com/uploads/2021-09-06/images/files/moxalonelokegemak.pdf In PDF document text
    • http://naphotelbangkok.com/userfiles/files/vapizuxepuf.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/27139239408.pdfIn PDF document text
    • https://sadex.pl/fck/file/zaliwexuvojowe.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/83750406860.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335867b8ed0---81108009693.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/domomawizizalaranodebug.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/bivofafula.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/66303251167.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/33541308212.pdfIn PDF document text
    • https://cecprint.com/images/file/nenubilatizazuz.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/35940909427.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/95519603063.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/lepanovudejajunitetak.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144976236e40---bonag.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/9316764950.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/17270929363.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff5622275e---gipedunezi.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/99153278815.pdfIn PDF document text
    • https://lazerom.pro/media/file/34642319675.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/buwuwugukaratazesupuzu.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/44474892485.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161457fac6585d---38905321820.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/59649831980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ymusic+app+downloadPDF 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_off0000b301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB301 14592 bytes
SHA-256: 05b6d1fc1389593019f25d57f481a8536d847b755e9306065b5c940923089362
font_01_sfnt_off0000d78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78E 10512 bytes
SHA-256: b0fb90e248ea093fed4e44468ed0a71cb47170f8acd98a84d6d2e2ae601728af

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