Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9f2900d2234eec…

MALICIOUS

PDF

88.8 KB Created: 2021-08-18 10:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ab5dfe91e839ca5b3ca622e0573e9d4b SHA-1: 6d6108adf17c0c32437290b1cc1055189b43765c SHA-256: 2d9f2900d2234eec672292780d42a35019a4e85baa9e6b33f4f0825777d4dda0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm pointing to compromised WordPress uploads and disposable hosting. This suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/64baa5dfbc41a530ae945127c8b6f9d8/pujozuzuwinumupageji.pdf In PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/h1pudt9qq57cnueu5jtpj1q7r6/xotipiwiwexare.pdfIn PDF document text
    • http://splogservice.ru/content/files/jetumipuzorufafovugon.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59f2602472---wukumowuxilan.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/f2fdf2774acf0b6e554ee1b0da794124/52958392136.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13dea9628b---fojebo.pdfIn PDF document text
    • https://soechi.com/userfiles/file/xoxemedu.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/xukibororolosezusi.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/73986910290.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ab26aa847---99604182306.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/605147e1f185ca63995d4dbcd112ae4b/18013140956.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/57956092827.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b81dd23977282789ef51df9095d0acd3/9131296081.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/a4d75bd773a4323b9afac9565f5f265a/8193456325.pdfIn PDF document text
    • http://staropolski.net/Upload/file/vuvolagazonogikokog.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021728132576784.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/welevibotipozinebos.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745d795045d---51037779426.pdfIn PDF document text
    • http://irishvaughans.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/xupobejekapezuxe.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/darifujubejaxizoxu.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/nasumaditig.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/59205397069.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/mukelifoxenegesad.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/jewuti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=wrong+turn+5+full+movie+hd+hindi+dubbedPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF447 16308 bytes
SHA-256: 0fa97fbaccd6e3681d7a19e709012d4dbcbe00a5837ddc3450c256f2421cca28
font_02_sfnt_off00010a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 19268 bytes
SHA-256: 0273d32c0e4325790a375b1e725b8b51ba2d235bd49bfff56a341231a69c3f52
font_03_sfnt_off00013ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA1 10904 bytes
SHA-256: dc509599e807b03890158cd76a2e792effcff7bebe73c77fa66df32aea9c3ec6