Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa212cac28b0bbed…

MALICIOUS

PDF

78.1 KB Created: 2021-09-18 21:35:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 15b4f69d343e3eb62821a57d53898cc5 SHA-1: 6b6d274dd73baa2df2cb9768eb9a6a7a0e0763e9 SHA-256: fa212cac28b0bbedbaafacfadeb77f998ef1e0a87c982fb0cdfd1a1a5b9d19b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4f657d59902503e1b98b3ede10d034d1/nirazelekizogedotuvas.pdf In PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/84216881693.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/462570809.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/nikepatifate.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/susutijavelawadodozemevi.pdfIn PDF document text
    • https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/zevaxusibilorewer.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/notokofe.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021091009040073499.pdfIn PDF document text
    • http://greenglobepms.com/uploads/77894937356.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/85722557578.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402a503aea9---buzewedosabudekatukuru.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/12793134620.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/7853ca381921f4e70365ad0f3e1b3d8a/rexopev.pdfIn PDF document text
    • https://norservis.com/files/files/24752568246.pdfIn PDF document text
    • http://dogable.de/userfiles/file/muxarodanizazavadatilivo.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210912072304_1407837801.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/ximopusogirimasekasasu.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/kipejitewuvobigaditaropev.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/49239786167.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/32512070767.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/89950881436.pdfIn PDF document text
    • http://rivucota.com/upload/files/wizab.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/25296033986.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/jewekateli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=bloons+td+6+android+freePDF 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_off0000cc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7D 17560 bytes
SHA-256: f6218dc6430df349f0a1a79f478efe999100e2d2119f05c324960aa12fe48403
font_01_sfnt_off0000fa38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA38 10568 bytes
SHA-256: 69a6e1f12823b21f396bec8dc8003ac99942502fe545d89eaca3ff4397db8c76
font_02_sfnt_off0001127f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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