Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd1356469f84987…

MALICIOUS

PDF

72.1 KB Created: 2021-09-05 13:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e1a8cd411eb970fe480f9727659fbeae SHA-1: 6c404833a1100e3d82717b2488a417ab1ae8af5d SHA-256: 2dd1356469f84987ed7d79d76dd38e2541c4dab2f4e21381f557f27c009df5a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and numerous external links, many pointing to potentially compromised WordPress sites, indicates a malicious intent. The ML classifier and ClamAV detection strongly suggest this PDF is designed for phishing or to deliver further malware. The embedded JavaScript likely facilitates malicious actions, such as redirecting the user to a malicious site or exploiting vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/10fee8339bc7c803357b396d6c147540/xazovef.pdf In PDF document text
    • https://k-newsletter.com/ckupload/files/kuladataloxuzo.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/14652190760f7d3c982b2d.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/ufn/files/nurizojijusi.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/25236831660.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/muzuvefoduwepopuzoja.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/16912275216.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/wololominirakuxoloxesof.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/dc2e39f99d0ff78c6db058d454f05a08/jidubopum.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/5007952625.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a386df4630e---34762123279.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0839a8820---xufedorajo.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/rokajodoj.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/8987883909.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/senipaburekis.pdfIn PDF document text
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/10943289811.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/e830b401e6f4c70f1a8dab8138402d81/petifegixifupatum.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7cb0179e0afaef79fe133aa553244b69/46887705203.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/pukifoziwefowewakalosux.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1288936242---18978504179.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/66604092989.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084c1c37dd69---xasilizededesidulidag.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/gosiwudesuwemetutevodes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=signals+and+systems+gate+questions+with+answers+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_off0000b726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB726 11468 bytes
SHA-256: b89a7c52d352bbba7d990220136be52a4ad3c9115ac809ea033078dc2e75f721
font_01_sfnt_off0000d193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD193 15612 bytes
SHA-256: 05d8f05bd27bbb5301555d196356a653617bce04816a69501766d26a9be842e2
font_02_sfnt_off0000f964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF964 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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