Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80887f1afa42303…

MALICIOUS

PDF

83.4 KB Created: 2021-08-21 08:28:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 370e080dfbc3c8f1e6d6774c3a73bbe8 SHA-1: 9d416dd8fe2d076ae7947e9160df797c66cd14b7 SHA-256: d80887f1afa42303246c0afa7f89d23ff3e78c638d64d6ca9e5c09b8db70d1e5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to PDF files hosted on potentially compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this is a link farm designed to manipulate search engine results or lead users to malicious content. The presence of JavaScript indicates potential for further malicious actions, though its specific function is not detailed in the provided evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://canionglobal.com/FCKeditor/file/74620049530.pdf In PDF document text
    • http://dansensvenner.dk/imagesfile///28188052141.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/amprdebpk9o39ooea9kmoukonm/88260885903.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/a71d35fd398aa0854dafd6f67e29289f/9556753892.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8a580893e---biwomemedoxezizono.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/77844468786.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/dagotowatedolowo.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f6bcabee44f---loxiwabusafukofekalisux.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/57805015650.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160711edb35fc1---48839972619.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6a9813bc0---polinikipane.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/48cde49a90189bb10ffb8759d115fd10/50311874052.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/11989028182.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/2e508139711b0eb9cdca70fa0aa4adeb/39142386529.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/rubolug.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/57392367262.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607a422d8a4f1---92114663604.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210607051546.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/28214699417.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///tekobulo.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/fawekuzulezupajomalivadi.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/44458633039.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/nikavinozelenaremeruzos.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/98026478464.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ladojomisufojokiv.pdfIn PDF document text
    • https://tavio.ru/files/file/dogokitituxutud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+real+world+an+introduction+to+sociology+7th+edition+pdf+freePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC43 11212 bytes
SHA-256: 3077d70d867a8aba234f4c927057604042f833a2f34196012d99350b7a6d9319
font_01_sfnt_off0000e660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE660 16420 bytes
SHA-256: dea01e3cbc703399d776eac2aa15916321dbda090c03c0e46db1cb21afe12049
font_02_sfnt_off0001110d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001291e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291E 16084 bytes
SHA-256: a79c9caf7d9fe7d7e6557dd08284a48a0650ee9668136fadcfdab94fba17ddb2

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