Malicious PDF — malware analysis report

Static analysis result for SHA-256 1532377bd4ee9794…

MALICIOUS

PDF

71.6 KB Created: 2021-09-29 06:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c47061e9b538cf27c3a4719b48d8537a SHA-1: bb9d503b545aef9e992171d698e5aee59149fd13 SHA-256: 1532377bd4ee9794041ecaf4f7436961e006471959410e1f5f5c2db7f81bd82e
94 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis identified it as a link farm, containing numerous URLs pointing to various domains, many of which appear to be disposable or used for hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a non-clustered link farm on disposable hosting, indicating a likely attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

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 https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bec6d7fcea---wufojokijexojuserabobaxe.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161454924924b8---69752431728.pdf
    • https://kiaavcilar.com/upload/ckfinder/files/nanejej.pdf
    • https://stancijanegrin.com/UserFiles/files/54960751454.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/52654132203.pdf
    • http://houstontca.org/Content/uploads/files/jazubolapofoxevesumoz.pdf
    • http://soc-in.com/data/media/files/godomatadez.pdf
    • https://sapporopools.com/contents/files/ravejusegiwuxodotuj.pdf
    • https://mongolia-volkslift.com/uploads/files/77193847106.pdf
    • http://yhbinternational.com/userfiles/file/sajefewaparuxekisovet.pdf
    • https://ikuseikyokai.jp/ckmedia/files/jilorajat.pdf
    • http://daming-school.com/userfiles/file/99807021238.pdf
    • http://chandigarhdatarecovery.com/files/file/tevoloruguzavosepogawofe.pdf
    • https://seo-methodes.com/userfiles/file/liwexenib.pdf
    • https://bientannamhuy.com/wp-content/uploads/files/donaxebepizum.pdf
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/zemunowefudizuruwopub.pdf
    • http://theurbanbazzaar.com/userfiles/file/zokavoner.pdf
    • https://ceccarmaramures.ro/userfiles/file/kadutonafetopowopop.pdf
    • https://dom4m.by/userfiles/files/guxupukox.pdf
    • http://classicalgardenstatues.com/uplds/file/dutosejoregige.pdf
    • http://sysquare.com/UserFiles/files/lipotosef.pdf
    • https://mediaskills.rs/files/fakenedemapivufikeki.pdf
    • http://mastervgtour.by/var/upload/file/pefizivonawasilur.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1614515a754472---milakamomexikaxaruratago.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=robin+studio+manga+reader
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5ed.bin
6cf9cc99a2cb5934de5ff6853ce9942c39c9492fdb824bd90cb8aa174a51b166		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5ED 18984 bytes
font_01_sfnt_off0000f7d6.bin
371cc5a38752f18e3a17e2bd971c631425be0eb06c36740e06d067ae86ed5f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 10832 bytes

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