Malicious PDF — malware analysis report

Static analysis result for SHA-256 290e6a52d921b66c…

MALICIOUS

PDF

78.8 KB Created: 2021-09-10 01:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: faa402e9bd0751032cee86981b34be11 SHA-1: 6dd864e5927b5c49b4855367b24d676e5c8ba67a SHA-256: 290e6a52d921b66c68959093ad84f40108f61561762321281c41a71924b4cf06
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=professor+marston+and+the+wonder+woman+watch+online PDF link annotation
    • http://okzawidow.pl/img/upload/files/3811566935.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/betixujo.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/zojomitosabedijokugefiz.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374cbca44fa---2303444677.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/8918737097.pdfIn PDF document text
    • http://jump360.co/upload/files/20210910054742.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/95104374370.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/filuxosewawejelaroxi.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/fafofe.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/62297331402.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/13466334594.pdfIn PDF document text
    • http://suranareecommand.net/UserFiles/File/90174122533.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135c9443b197---rimopisemunitajewulen.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/90546165132.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/2ebbb10ff30ec6bd94bb8d69a4ae3d2e/nerodijuvoziret.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a809e44d7f---22249309893.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/26402527725.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/11343389295.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/nasoxu.pdfIn PDF document text
    • https://invision.buzyhub.com/files/nabetanegigujanubu.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/rifonas.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/32556567767.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/83880188047.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/juwezapesinisug.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161384c145c56a---25116625355.pdfIn PDF document text
    • http://bulmarconsult.com/files/98282061175.pdfIn PDF document text
    • http://freeware-software-download.de/uploads/editor/file/80140181671.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_off0000cec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 10828 bytes
SHA-256: 8395e38b91d8400935a3fded7e2d5b2c017f48a5548cdf42b9c2d009bf16e0a7
font_02_sfnt_off0000ffae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 17588 bytes
SHA-256: c4e25b69f55eef071bf2f83689f83b0c4e0b8156b193099c90ff5691c0db0f22