Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d88d2c2e86c8a05…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 02:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 387f7eb9634ee12517eb259eaac5c4db SHA-1: e6ac56af292285999a84ff2382b38a586110df6f SHA-256: 5d88d2c2e86c8a05f27a2bffabf14669b2b1c06ed56f12d50cbc6f34e905f1e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites and disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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.
  • 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://jpt.mysmartedu.com/uploadimages/files/ximedotukodanevojonufexok.pdf In PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb12992eb9---tofotituzejavog.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/23d314e4aa6b7d76f62dc4ed354f55c2/42728621327.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/15881317012.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/e8b103854613283fbd9f32b9ac0f456b/temavisugogofudab.pdfIn PDF document text
    • http://hydrem.ru/images/file/xugej.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/37553593722.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/33409322264.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/6dcb826b4bbd39ad71a2836177106c7d/48284227087.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/862ad1de2b3b55ec765a73ed7de71cb3/julemat.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/cc1bb41d2ffb36b1763542e055d1fb28/xegowogosexodojibevefexew.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/95072917747.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nonimatokavagesoxonok.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf1ccb8576---17834051847.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/fol1h9mff3c7icj3nl11mso1i3/sokupesajogukexekifa.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/6ff2f35def0c0c3609ff47c63d44d662/fobenikibidudoginigolip.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/bbit50h2mi7cii4g18nrfah9ui/86033882764.pdfIn PDF document text
    • http://didopack.com/files/21191534356.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/42185712152.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/taduz.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/gosubako.pdfIn PDF document text
    • http://kgmda.com/upload/files/13069670086.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/73163080984.pdfIn PDF document text
    • https://tanasiri.com/piceditor/file/71278976899.pdfIn PDF document text
    • http://thebranchoflife.org/clients/3/37/37a84c4c47f147f839b5d5a44bb1b86c/File/jiwobijodixedotefaso.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/kapogorano.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ae11390a3---93941257830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=fractura+bimaleolar+de+tobillo+pdfPDF 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_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 10724 bytes
SHA-256: ae020ac27a8ca89dac30bf8797aa9d147e9afdbd1566d96bf0536161b4139e27
font_01_sfnt_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 20700 bytes
SHA-256: 77aaa296025029f98c6d2911c8d6affb91dbfe5427867bf660413683127ae125
font_02_sfnt_off00012631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1