Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a2e7b257926117…

MALICIOUS

PDF

82.0 KB Created: 2021-09-23 03:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 92e9639daa299a3f3b26eae4341ad89d SHA-1: 574774fa6a8e0490342fb3cf5fac47f7941870d2 SHA-256: e0a2e7b2579261175d2d64fc498c0a1f211591da1c4ef5b34b52a3cc2f5811cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, and one specifically lures users with 'minecraft apk download'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=minecraft+apk+download+2018 PDF link annotation
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161462106b2e95---bavewuwajuzebumotibi.pdfIn PDF document text
    • http://panova-art.com/files/file/pofamutobijadumejerufuk.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/womolonogexan.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/fodajenujegurowularef.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/69613700983.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/dulaj.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/71607284543.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/22742528485.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/wozezojefafiwas.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/wixagubuxodasar.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/66484040458.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/46106854117.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/17894216715.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/polowipam.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210917200556974011.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/zunepamixururus.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613212aa988ed---64139147401.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/a1a4982b4b23b7bfacc6546ae6240b09/2520000189.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/48458976957.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/18325628404.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/59944985108.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/lupetotigupedozokoroded.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/38636375197.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/50975587113.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/cacb538b9a1f62873f28d9c318d3a519/5324696664.pdfIn PDF document text
    • 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_off0000dde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE5 16420 bytes
SHA-256: 927687b73e5dadf7d4b9c63e79ff2e09fe2f1c6db07e95d857f2e2e54be301aa
font_01_sfnt_off0001084f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084F 11116 bytes
SHA-256: 0fdbbd4798efb2c0e1bbfdcff83283df69be5291ad521a899b9cbcb6baa4b3b2
font_02_sfnt_off00012286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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