Malicious PDF — malware analysis report

Static analysis result for SHA-256 01949e7b9aa485a6…

MALICIOUS

PDF

70.6 KB Created: 2021-07-01 21:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 211081c9e5d35eae1e2d9aa03f11f2ca SHA-1: 561747000aabb01701fd4b149963cf1b14873dda SHA-256: 01949e7b9aa485a6ee17eda4488cc2b81e5c6d0fbc95d1c874d03e36e3a91eb2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The file's structure and the nature of the URLs strongly suggest it's part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5042

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://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/7d3e743b2a87f3691310dc16f0099172/74691689773.pdf In PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d994064c0593222adc2dcabd2f37867e/65201376665.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021052018260270554.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800d8728899---28241840980.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/jarowinodanigekolo.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/lomadogowafidesurafa.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/d45cd3af9c8e8eb3c98d70388cf30d18/davomebimaraz.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/87443828726.pdfIn PDF document text
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/davarolofisoj.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/f1e25a266054f1d6707b500a6d44da54/pugowojaxupul.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607050b88d1cc---80737504214.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/53b6f873ef9f55851472228eaad6722e/3762861388.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087abb55ed15---golefelakokadefemenuka.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/56815347955.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/dgrg7e2vfpqs1ai4gfrrsb1r47/bezodifitulired.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd6963ceaa---20136656285.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/e15c6151a950db3bcdddf606d37cba7b/bubusotejelatuzidiwafer.pdfIn PDF document text
    • https://corghialberti.it/file/kozabunegamobux.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/rarunalopajerebezuxa.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/jovekebisekulaxu.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa35781fa84---15587082094.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf5630f0de4---nanita.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/rhqm8j244u4ethh7l63rhasobv/34644015520.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/2ab5b9fad207b33411808fc343bb2ef3/lalediwexafiwepadurovixin.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608364041a2ae---71819280969.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/25084048961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=lateral+incisor+babyPDF 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_off0000f2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B2 10432 bytes
SHA-256: fb1924f3090555a28ace2b3c4f60d8da09feea37f25e827ba80675a4b9373ad8

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