Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea0dc1e25507067…

MALICIOUS

PDF

84.6 KB Created: 2021-05-12 04:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd948d22dced58045c0ec4071ca0a4a3 SHA-1: 82c972ad038e3f9f4ea4f535e37c46f2bac5ce9f SHA-256: 6ea0dc1e25507067884cc93d58f6b54a85c960c7c14c6d6ac61f2d343bffbe35
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, with one pointing to a compromised WordPress upload directory, suggesting a phishing or malware distribution attempt. The document body, though heavily garbled, indicates a lure related to an 'Irish pronunciation guide pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fresh-j.info/images/uploadedimages/file/famavin.pdf
    • http://opakowania-loga.pl/zdjecia/fotki/file/vetokowiwamubidifibaw.pdf
    • http://alemotta.com/resources/original/file/tomiguw.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d67f14a337---vuner.pdf
    • https://stratasphere.online/userfiles/file/wuwij.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/6f833861f7e5c3362ab5cfc98e20c96c/xazulosuludujije.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805c1a2378d---jiditexifegenate.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/7cd3391126ea53939b48ad2b1e54d3d6/31574485675.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/a14fa54c1b1aa05f8a5f331c243f1221/56462621241.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/aknn6o88cl0909c8t2e9ao09pa/88844191545.pdf
    • http://provia-events.de/pics/fotos/1/file/72922336551.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0fc9cf5f5---95814196617.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a90b7b4ef---vafudim.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/6e283207b3008710f667335ac4328796/42752109190.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=irish+pronunciation+guide+pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082993601907---58409109251.pdf
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010baa.bin
6a661d0193573826332f21fd4f98f583022d4672cde148d64ce0b6104f0360fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 5320 bytes
font_01_sfnt_off00011dbc.bin
489afbc7fac4f86d923f01b17bd92521bd497410e227d4894d5aeefd16ffbe51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBC 11624 bytes

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