Malicious PDF — malware analysis report

Static analysis result for SHA-256 07de71d5d214fa11…

MALICIOUS

PDF

196.5 KB Created: 2021-07-23 13:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4927e4e4697feb4b9f79c0d40e113bfa SHA-1: 6539ce1beb89e21f0d246d1a93dc66ba008fa160 SHA-256: 07de71d5d214fa11d0ee81f385a8e5403ed80cdf886ef29b0c826ed25c225256
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is a common technique for downloading and executing further malicious content. Several URLs were extracted, some pointing to compromised CMS upload directories, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7708

Heuristics 6

  • 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.
  • 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 http://orchid-daikanyama.com/userfiles/file/xipabenapezizesekaras.pdf In PDF document text
    • https://ka-base.no/images_content/file/pazidiwikubun.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/7ce7463fea62a2e17d6c3d967c8c4819/3912297337.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/84021307623.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1a7d0505d---limezulasage.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/ebe9dc3693d2a5c5de497adcc00d92fe/gufumifuzewafalifozusak.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/4d9maa29sa4kdjmvijuholidb4/84292884927.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/17915680134.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e904cebe7bf---zogomemukepata.pdfIn PDF document text
    • http://vinmexindia.com/uploads/56738642106.pdfIn PDF document text
    • http://rykatd.com/files/gexijivigonufexapaluxu.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ictn02ot082k3sd5r1lqfp5h95/85502314441.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/7d78mlror8esnohckivv3ip8d6/kapusuderovelimusatejedum.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/528fae0fe3ed6e2545c7e4f177f1fc87/70572262781.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/nexezoganewulekiwawafiku.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/fulojitobab.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/12143933946.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afad51422dd---motabunu.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/jewuturunadup.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/71963535623.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/9328814465.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///10913107246.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61fe72ada6---demegofozizagikopidora.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6965d435---zulunatix.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/tavokugenijepesagaxu.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/buladebezajira.pdfIn PDF document text
    • http://fygl.net/uploads/file/160845465202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=what+do+peasants+wearPDF 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_off00027672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27672 10432 bytes
SHA-256: a8aedc255153748331ce1ca665bc7af5667f51ec18d4d1707e317996cb578744
font_01_sfnt_off00028e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28E1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002a630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A630 17244 bytes
SHA-256: ad36b4a36e18a9c0e0d4dac8556f3c7833dcd79b798fe2b84d04f064023f4c7a
font_03_sfnt_off0002bfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFE1 30620 bytes
SHA-256: 27ed3d57954899565a1be46876738ca2d74e758410e53a320cfe88ebf16249ba