Malicious PDF — malware analysis report

Static analysis result for SHA-256 6800188cb7bcf2c9…

MALICIOUS

PDF

104.9 KB Created: 2021-06-30 05:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 542804b57608abf6fd6a13a9e4e1771b SHA-1: c144f505c2a87cf33f637259512fa91a941c1026 SHA-256: 6800188cb7bcf2c956ece9bd8cd15fd2b17fbc1b1d01aa21047e62557436f279
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The heuristic firings indicate the PDF is designed as a link farm, potentially to distribute malware or conduct phishing. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=list+of+shipping+companies+in+india+pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c60e1319---zonipababanojowulekib.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/9b7bb4177270dbcb6ea5a706459e4f11/soruzozebuxi.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9d2d3c287---nefizijoziwe.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/221c144d355eea885dd5e1c0cc8a933a/83112387846.pdf
    • http://pi-consulting.ch/download/wemegekavesotik.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c8875272c7054a751fed16fec4701c90/60388365403.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d542a418092---disivov.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/63d3fe5c34d8087c20242a0286cd957b/lexoz.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16076a92896c50---tijikofivawel.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d5506526b---69525278339.pdf
    • http://olympicburger1988.com/uploads/files/37539266212.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-8/20210508203821858575.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e96c116a36---dixavepabozu.pdf
    • http://volvo-cars.jp/js/upload/files/84761163622.pdf
    • http://splogservice.ru/content/file/pezol.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/2o1j68f69745lrlsoo0h34g8sk/44933180920.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a402569dfa2---fofokurakigazajibel.pdf
    • http://diamond6ranch.com/userfiles/file/34082136436.pdf
    • http://bassbasement.org/userfiles/file/72820781992.pdf
    • http://safarang.com/basefile/files/74417357284.pdf
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/97389180769.pdf
    • https://twinslock.com/ckfinder/userfiles/files/negix.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c432d6f6f---62580959730.pdf
    • http://www.specemc.ru/upload/files/xagadaro.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160826910507c4---wutipejefozibike.pdf
    • http://edison76.com/clients/5/54/54c13950cbd15a81e6fb4362eab8f273/File/tasapivi.pdf
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/goloduvefitesusig.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013731.bin
ada42ca360a29e1ad933e950fc1346d238b51dcedf926a5927ebdb91c8d2b562
pdf-font-stream PDF embedded font (sfnt) at offset 0x13731 17696 bytes
font_01_sfnt_off00016515.bin
94291dd89edc438eb3b089554ca16a4dd5a3f3a02c9f6e5eb157efbd67e4f360
pdf-font-stream PDF embedded font (sfnt) at offset 0x16515 10876 bytes
font_02_sfnt_off00017de1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17DE1 16792 bytes