Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12d02a04f393c88…

MALICIOUS

PDF

81.4 KB Created: 2021-08-19 06:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f32982d89bc53a910d1d6560bd5d0946 SHA-1: a50239f692523aad719fa0405edbfb0f3aeb5d3e SHA-256: e12d02a04f393c88b6fb376dfa3dd231baa8cbbf2f411149e3b77811fd3c91fd
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content. The document functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are associated with compromised CMS uploads. The primary purpose appears to be redirecting users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://vitalchurchesinstitute.com/files/file/fitopovelamexuxudep.pdf
    • http://aranykoronakft.hu/userfiles/file/sorobevuxive.pdf
    • http://mariamozharova.ru/uploads/files/vijefakojoxetojenig.pdf
    • https://menuiserie-sainte-anne.fr/userfiles/file/ragejaw.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/qev1vpum3q00v4qpub4u3k1b6o/16654365708.pdf
    • https://jurad.eu/files/file/romujuzadezodoperalubo.pdf
    • http://babywagen24.de/userfiles/file/79572385859.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/723ed4914cefd2dbce76c62400acef61/93663886987.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/18218905702.pdf
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/94794888952.pdf
    • http://pogologistics.com/ckfinder/userfiles/files/mejijapetak.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/eab0a00054aebfedf53b932088e6696f/10174071209.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/458ij842ru2mutkqvjc6d8i5dt/nudefipewifujur.pdf
    • https://megalightgroup.lv/uploads/files/58286411924.pdf
    • https://allcreaturesinc.com/files/files/sirofigapokuxeruradosil.pdf
    • https://rugsinc.in/UserFiles/files/teturenafelu.pdf
    • http://bright-inter.com/file_media/file_image/file/sademetuvidejuravofug.pdf
    • http://pamat.ro/UserFiles/file/39655218959.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf662e69304---85744402963.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/cp0sb89989vqttfcq1uhqd7je5/11763838791.pdf
    • http://licausi.it/userfiles/files/9909688536.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h1imlnk967uaj6ncfcf81t49fo/degotikiwelib.pdf
    • https://elnativocoffee.com/silver/upload/files/81100100825.pdf
    • http://winterwonderlandzundert.nl/uploadimages/files/34192549064.pdf
    • https://aduanaldelvalle.com/userfiles/file/jufejavebi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=yard+sales+topeka+kansas
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9E 16792 bytes
font_01_sfnt_off0000f5b5.bin
5891909ddbabaf4573ad1d222a7eb8dc5c49ac4e4ddad3bf68ec79e46852d5c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 10368 bytes
font_02_sfnt_off00010d40.bin
877b0a96bb9afc773322692e47f38167ff2ba3e329732f2410a6f298b5d327c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D40 16320 bytes