Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b236d179579611e…

MALICIOUS

PDF

206.6 KB Created: 2021-08-01 09:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ef4868865c14ae64c9265f64f24a1973 SHA-1: 74ec5d6f89b0016040f94648b31507abff4039d9 SHA-256: 7b236d179579611e44dccb4f99a532838bfee4bad5f2ebc52e90dccae45122bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links pointing to compromised WordPress upload directories, such as http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3u8j54n5te7d09035dhn1klksh/mujinidugoliwewudotanupu.pdf, strongly suggests a phishing or malware distribution attempt. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9559

Heuristics 5

  • 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.
  • 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://sasalidayanisma.org/uploads/file/larunifu.pdf In PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609193695a09c---12681118424.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/46739301128.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609968e75ef17---mugarezot.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16077329f8d376---seduwuzitefagabaxurikupu.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608aef10ea438---23154650814.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/90529694455.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608266f822f07---pujojafojisefumuwiduk.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/gezazexo.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/20772261518.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021571359127410.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/22126503102.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2874128c9---16440581027.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/gurep.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/zopisubebatafujove.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/fusojaxepefojavax.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/zurudejijuva.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3u8j54n5te7d09035dhn1klksh/mujinidugoliwewudotanupu.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f640d6eb30f---ramex.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/28588560616.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085dba6c65ca---23244733479.pdfIn PDF document text
    • http://fittbike.hu/files/file/luwizomutazewovaj.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b22fafe0936---nijosegogu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=phonetic+vowel+chart+examplesPDF 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_off00025d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25D0D 50304 bytes
SHA-256: ac8a57cfd78a1529193e6e2c985fbb7ecf4c07755d8a9f57afb4e764da07613f
font_01_sfnt_off0002dd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD72 17872 bytes
SHA-256: 3500ca9e889f9c362eb298b400c1ef7abe2bb6ccdd560d496cb8fb495795648e
font_02_sfnt_off0002f927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F927 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0003113e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3113E 10892 bytes
SHA-256: cd3cc2945679d5c71db592076e03147808d54cd3f3ef1de61098611c25f762f4

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