Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd95be699fb6861…

MALICIOUS

PDF

82.3 KB Created: 2021-08-23 11:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea9f60fcae3eaf9d74535f1f755e4a82 SHA-1: 692b3c0823c1f50f92bfc8f236da027e68beef84 SHA-256: edd95be699fb68611819a0a44a6dcf87e63d19cea30a23166baba63a68f4c837
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to disguise malicious links within a seemingly legitimate document. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • 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.
  • 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.
  • 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 https://garglob.ru/uplcv?utm_term=rotate+scanned+pdf+and+save PDF link annotation
    • https://altinhediyeler.com/calisma2/files/uploads/lelexexenunonu.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/21908886636.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/11682313761.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/ee4bde3ac45efe7d6da41dd1a948fabb/xazenewuxaxezowukisovunog.pdfIn PDF document text
    • http://flirdining.com/uploads/files/96638464609.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/xuranozizasuzoge.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/xabisusavub.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/91488381522.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/38085704095.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/939f791152dd704adbb41fc030f0ff8f/povodisexamisizoteru.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/45113b79e133b90141434d9fd64b912f/29573414562.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/nugupiredivomenutevo.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/kanubugodozo.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/vewufoxetogunobovazemebot.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/saboleropenudema.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c41cb4ec1ed---perewejemoruru.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/femudefunikobini.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/mojis.pdfIn PDF document text
    • http://shesob.com/file/files/51075085316.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/d9f6654dc1da297dfebf483212ed2c05/jipeta.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e59b74740.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609deb3089a6b---pepibijan.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37701490164.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ce46519ac2026d80b24f6119ba9f0f2/91536118518.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/riraremoriwaxemigosid.pdfIn PDF document text
    • http://land89.com/ckupload/files/43826950891.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_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 10488 bytes
SHA-256: 9ff4e65418f9ab574eb686ab48100a867457b388b1e3f2135d4ecae2a2e46b91
font_02_sfnt_off00011197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11197 15808 bytes
SHA-256: ab59658b74d305f7458d30eb9ba42f8c078694c1620b273ea10966c46f1b3277

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