Malicious PDF — malware analysis report

Static analysis result for SHA-256 289cd6edc9b8da7c…

MALICIOUS

PDF

86.0 KB Created: 2021-08-16 07:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: de90d565fe34dd34a6dd858cdd3fc769 SHA-1: d996f0818656774a9e7ef62b259eaddbc6d4fccd SHA-256: 289cd6edc9b8da7ced0050dac884ea705312674dcaa2e58c99d565449271afb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or directing users to malicious sites. The presence of multiple compromised or suspicious URLs suggests an attempt to distribute malware or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/nui406cso3rmbr9dvvnfe715g2/37272271744.pdf In PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/91470892528.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/29730602642.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/50570944937.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/73905543081.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/53505608470.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5717434969.pdfIn PDF document text
    • http://artside.org/data/temp/file/zofoduzalogatiro.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84defe6a2a---2817676764.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/1ca6712c628e5da84824bd935e5592a7/35363492213.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c6cc62fcffa5ff063c7f83edd9cb4d0f/zuxovaxewajonogus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ae8244de1---lofixixakunizejesevex.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/zonusowef.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/zokujolubi.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e0db3cf4cacb57909a040a52ffebcac/buribek.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160af6e7159fed---jowarerojokonixebekox.pdfIn PDF document text
    • https://norservis.com/files/files/domunofekazi.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210713_131711.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/93332730991.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/e2507275330496aa1d5f37d9c2491176/33885614721.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/8df5a49755efe55daf762659f5e7f279/19653988564.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/rumipaxobosifarazatow.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b5480c10f8c---tadekad.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/nubimefafurovojofemudimo.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf2e59f4b0---49149877946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pokemon+black+hack+rom+nds+downloadPDF 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_off0000e4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CA 19128 bytes
SHA-256: 0a5cbe3f8df2286baa6d83a8d1ab99ef37651fdaa46bc59286ac7300d7bb5855
font_01_sfnt_off00011699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11699 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB0 10764 bytes
SHA-256: 78b48f7613b453b5af7dc7f738925efdee5574081011609749734fa75d259e7f

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