Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b948f0da941187…

MALICIOUS

PDF

83.5 KB Created: 2021-09-12 11:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e47a98984fd38a4c9a27bb10f8812cc9 SHA-1: 3792e5fdbd1258a78a7b0abf7579919eb03d2fe7 SHA-256: 60b948f0da94118701c0e117f092900af30570189a1fa334dfe2d844dafd4503
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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
  • 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 https://corcreation.twbiz.me/data/fckeditor/files/20210908_134818.pdf In PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161370b44e3612---49082812866.pdfIn PDF document text
    • https://clubon.top/uploads/files/kegigonuwek.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f377a04bdb---nikegoro.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/18676985293.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/28001054585.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/63269778593.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/genoduvuxu.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/31277166746.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/def3lj7v0j11ongaghvjdgcvng/48677274617.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/kanupegulom.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/jen5f3pv7eqntn2gr0rf5s81d3/92961693786.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/wesunetelamajuduru.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/79735924711.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139ef0c90acd---77447581829.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/4738636674.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-8/20210908000806860375.pdfIn PDF document text
    • http://midoriku.zaitakunet.jp/app/webroot/upload_images/files/jobejukapawudinemilus.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353ac77c9bb---80361415445.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/polazukugunox.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/5999859e4f8ff5b38f41c2c76acebd77/27036829971.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326f21ce0da---72715689246.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f3663883ba2aa9f5960452a51a328464/ralutifajatajipa.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/zezud.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/17116221484.pdfIn PDF document text
    • https://senfina.top/uploads/files/10747785225.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/41230663670.pdfIn PDF document text
    • http://btfa.tw/upload/files/filigevobirosop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+do+u+get+v+bucks+on+fortnitePDF 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_off0000df76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF788 18424 bytes
SHA-256: 4de13398f9a3803e4e5838d0611f9423f2e5c8c32a4a5cee41d26ac2516f76f6
font_02_sfnt_off000126cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CC 10916 bytes
SHA-256: 95b137a564bb7e469e2d06eaddb5a318e1052a210826ef75a56179fd12a4c3ad

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