Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8a64a8a96d55a4…

MALICIOUS

PDF

638.1 KB Created: 2021-06-29 08:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 1e31a8a41283d42952dc3f2f124e6818 SHA-1: 401d7146e491e89b0a3ec796da0f26cd345b22c6 SHA-256: 2d8a64a8a96d55a4540b3b60a9d81e7626b39dcab9a50725eaf68628e9512372
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links pointing to compromised WordPress upload directories, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature. The embedded links are likely intended to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6568

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62f755ed4f---tozegoxisijexitoreletukaj.pdf In PDF document text
    • http://royalgoodviewresort.com/Uploads/file/97318073748.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d0edac810---11241523433.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/ridisijakezezodiz.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/12286047503.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/kokigudelabizag.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/96723515147.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/sedinixururakeni.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/59798419631.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/e0fcafd212fd1114aff3a53f1ed9071a/75784348156.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/b3951cdc4e1334aef7dcc048e642d367/vovuronofarabejofit.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/a4fab122317f790fc870ae8c0b5c1844/129078666.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0e1ae3824---65396662944.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/golojigodaxomubozipalu.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/ab4ab3a8b5cd1194b16adad7f34b935a/83026366658.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609615d14adb4---11628367938.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/5d0aa15f4634ca5ed078bb16206c75e4/86532437111.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/663e5e6f343357293887ec1f741673aa/54709135831.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2e13eb7dd0e68c99752b66457811aed3/75617420615.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/pfv9d903253r3pd0526i6r5isv/nozanito.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/54868863823.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/63220777901.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbf3ee87e0---gujodutedojenuzufawape.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077d5d28f11a---sapezaletove.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/50694897377.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/e13op3d9d4t40rs4oclim09l42/49300712639.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=cheese+and+chive+cob+loafPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00098519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98519 10612 bytes
SHA-256: ff5edb3ea882ff5ac9657abbff326ed685166007f2ee9912b85b5b6e1ce16df6
font_01_sfnt_off00099d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0009b564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B564 18588 bytes
SHA-256: 73eb5f5d5bf491935b7b478839b85efda153627afb29d60233c078895713a6fa