Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c186d1fa3a0e089…

MALICIOUS

PDF

87.2 KB Created: 2021-09-20 00:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8dc67dd5b571b704aafc1d10435093d1 SHA-1: d3074032b2761a2c7c134e02983dedd62739069f SHA-256: 7c186d1fa3a0e0892d60e8c7b5ba41e4cda68bd7ec2d7c53a186b607d7b26f52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of external URIs and the overall structure point towards a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=how+to+know+who+stalks+you+on+instagram PDF link annotation
    • http://hamkr.com/userData/board/file/xabex.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/81950862566.pdfIn PDF document text
    • http://cpils.com/userfiles/file/nuneredut.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/coktgatqrqi20ufpnjgdf0i57i/61351953029.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/lokipagekelatabizurab.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f53930453d---jaredu.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/kalujutubojaribaxorobukov.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/68760177786.pdfIn PDF document text
    • https://chingchia.com/uploads/files/202109020550535416.pdfIn PDF document text
    • http://sokole-tps.pl/userfiles/file/gasumupunukeworufogek.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613b899ca653f---83871227872.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/a703c1f3bce4b40b97b7e0634ba70484/narezeteseruwete.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1614602dd397d4---nabefajekavovugobe.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/36500029430.pdfIn PDF document text
    • http://apothepharma.com/upload/files/2663765025.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/lenabipaworaw.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/figavizurejuzag.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/37794993340.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/jatate.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/80823302235.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/18445367462.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140066821504---gemudo.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/fugapenoxabakefetazu.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/lofebapel.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/69159333883.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_off0000eeed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEED 17960 bytes
SHA-256: e3b3d064244548b31e766bd351e1cef42e2d8c519a3526664232b00ba3abfda1
font_01_sfnt_off00011de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE0 10808 bytes
SHA-256: ee340fc38c3c7f34b03327fb3359e602298656d42c7468f361a8525bca50efe4
font_02_sfnt_off000136a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.