Malicious PDF — malware analysis report

Static analysis result for SHA-256 227216a2809f75f4…

MALICIOUS

PDF

68.1 KB Created: 2021-09-26 04:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6b30751eff02150761b1f595126a28ec SHA-1: 6e72054dcc788e4e4f912da28a7df1223fce8daa SHA-256: 227216a2809f75f49b9341faa5155de62b1c13b508700d1f9d5b5655df291eb3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of JavaScript indicates an attempt to execute code, likely to download further payloads or perform phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://garglob.ru/uplcv?utm_term=travel+boast+apk+android PDF link annotation
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/d4b468t5ehfl7qf235k1106pj4/kogenibovolimofiva.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/raliladilutumop.pdfIn PDF document text
    • https://inarsindbari.org/uploads/romekotizimowiko.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/75764728103.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/92565885637.pdfIn PDF document text
    • https://thehouseproduction.net/file/48171991107.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/80591753059.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/7468310324.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021091215242570.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/78756489226.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137451117307---gunenidavow.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/78527305758.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/pigujej.pdfIn PDF document text
    • https://tpk-m.ru/files/file/zumuxekavusezazoked.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613b246831076---mojotewikeb.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff91901a8c---47882550418.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/mesobufokujajasovidiz.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/98930541288.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/moxinupifaxivusutufu.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/77138205964.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/48843884417.pdfIn PDF document text
    • http://unseretochter.ch/images/file/34124386608.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/28933069084.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/balejokeliwuxe.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_off0000adc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC6 14676 bytes
SHA-256: a37a69b1eb05e2afabaf3d878e0a3c73b69d93e155cf3d7b907919fbe3577183
font_01_sfnt_off0000d243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD243 10644 bytes
SHA-256: af5b06d74776ff241393f85d0002a1a52b5c3ac136d1207f11c7926656bf0038
font_02_sfnt_off0000ea8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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