Malicious PDF — malware analysis report

Static analysis result for SHA-256 006952d91d76a1b0…

MALICIOUS

PDF

58.1 KB Created: 2021-09-06 19:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb1b9bb2f6baac1f35e5b6d2fa0fe8e7 SHA-1: 63166fa6fd83fdbb40d5ba4049ad1a41990fd63b SHA-256: 006952d91d76a1b01df6282a6510ec48d2f76da4f90557d598a8ea5c7b7dcb64
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The presence of multiple links to potentially compromised upload directories suggests an attempt to host or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7841

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://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/85dilooe7j4m38qchapf905gnb/47031337638.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607823fce68ea---waludawuzibow.pdf
    • https://osiindia.org/ckfinder/userfiles/files/kepoluzabirafagaxojujiz.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d09d67a16---96718500226.pdf
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/jawulesabojafawajigawovi.pdf
    • http://anvlaw.com/userfiles/file/zozawaf.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0402d7b30190118f16be43d90b147350/zitovuduzaramizevesogaso.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/h3bre8bophcb16pevg6hkag98j/kesatimarivelefama.pdf
    • https://ive-cal.it/file/38825011275.pdf
    • http://stilistspb.online/public/files/uploads/files/70920578119.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/up98ih5clb57cdcgng0r25idch/vinuboxegarekalozinajut.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/lomapoke.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/5087256975.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c3c5e22de---55869138664.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/161276b57b9232---16908169008.pdf
    • http://praconsulgroup.ru/pict/file/texuboxigaradamowiji.pdf
    • http://kengosushionlineorder.com/uploads/files/4991460271.pdf
    • https://triyoga-tv.ru/userfiles/file/82954917329.pdf
    • http://minhphucvietnam.com/uploads/userfiles/file/neworovulitawakuxapimub.pdf
    • http://parvazyab.net/basefile/api203/files/26249034165.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b317097455---69997692128.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/47096b50a1496de270237cd767553e3c/63331832971.pdf
    • http://bahtiyardishekimi.com/fckfiles/file/78360658996.pdf
    • http://evrokomplekt.ru/userfiles/file/79661179545.pdf
    • http://emeat.ru/var/files/67321001803.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=como+fazer+manual+dos+padrinhos+no+powerpoint
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bad8.bin
a968d202e04eea3a0da4838bd1a245484fd2eb0475604e1cafb2e77a43be2924		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD8 18304 bytes

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