Malicious PDF — malware analysis report

Static analysis result for SHA-256 602da75e45015782…

MALICIOUS

PDF

80.2 KB Created: 2021-09-08 17:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b939ac456d4e994bece810a56e8101cc SHA-1: 2f56728a6fb9f8ddbd1d7c811af211534355b90c SHA-256: 602da75e45015782df7e82f1b50ea397311502ef3d5f1263a2f9f5ee8a66775d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to external websites, some hosted on compromised CMS platforms and disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://garglob.ru/uplcv?utm_term=ethical+decision+making+in+social+research+pdf PDF link annotation
    • http://healhumanity.foundation/userfiles/file/47140930426.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/7620460188.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355fe11e346---27010244524.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/67243044529.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/cd288ad0674fd041a0ac43c9fd9da95a/gugukagexisepemavetodazog.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/33891739405.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/86233754745.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/75188743486.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/11255509738.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/ridarug.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/83957685018.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/a06iei04fh2sc02lohd9liq1hu/xosawetadil.pdfIn PDF document text
    • http://elma1.ru/!upload/files/95079204723.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210905_70AF34A18692D603.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/towawuwakavigez.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/7832538288.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/fusunizosixe.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/dc910f6b3babe69d93b483943fe2bd9f/40799916689.pdfIn PDF document text
    • http://rhondachem.com/d/files/rumidolomixikofugex.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/biwebabam.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364bd3eda0b---12004864626.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613542f8f3629---52926387747.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_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 16344 bytes
SHA-256: fbce35e0463f5e46903104e584c2aeaf76bf5dd6ac978aceb81df30da5e60229
font_01_sfnt_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11981 11144 bytes
SHA-256: 0eff76cf4fd3a6e63bc886c0a6787c2f0c60147d111b959c3f32b2fcf4577656

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