Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1fa69cd717e818…

MALICIOUS

PDF

78.3 KB Created: 2021-05-10 16:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fdfa758a238c7ec1f0ce9f43a09d8c3 SHA-1: c8f06dc8a9a468ac98ab82da0138677f22afc2f6 SHA-256: 3a1fa69cd717e8181c927f72a347fd3207c2073c799186e116811937ceb3ec48
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs pointing to potentially malicious content, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eafe49344c---xuriwatedi.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3c42c02db---xaparasulifilofigisep.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7a3d04ehrv5ar0mvj4mjfohk1d/95709513595.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/59a7213ef37be3d39604c62bc895cba0/76740717104.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6278f829dd5b7eaf7fc9a8818d244d5/75925523615.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/035e0b24c8fce6afd55a15661f6de816/55995559904.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b32fc85f7f3330aaea95123f3a140ffb/sirovuluxitubevafu.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/781d6b76474865b4d0cf037e3d3354fc/42822869199.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/ab6428ec7bb65c2dab1decfba2945d87/lumovarowevow.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bbe4a2fdfec2b6db75eb053798f05013/99126867910.pdf
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/85bc410e26aa62983d1b67ea11c5f195/serigavonikolarokezedodob.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/444170bcef4583aa1ef9278884db20f6/47797024686.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/dasawolunexewerogu.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f6137ff63---35461428970.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789c2176f13---14107106539.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/327c3643f934c30ce5b448ed7b06b494/36156975583.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ngk5111ccrgv91ia4590dbjh51/47542825463.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=ncandweni+christ+ambassadors+music
    • 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://scripts.sil.org/OFL
    • 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_off0000de76.bin
079add09ec2f9f21d69d9562e73ea1f1f72c810d93509ed5438504cb088f462f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 5348 bytes
font_01_sfnt_off0000f08d.bin
ef257b082d298a229fddfc42323b519099db1bb0fbd71c6b9831975908a65273		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 10976 bytes
font_02_sfnt_off0001164f.bin
f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1164F 16144 bytes

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