Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1a2ed8cef1b059…

MALICIOUS

PDF

85.0 KB Created: 2021-07-09 10:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcd65deb610032b9295e9557a90f6ccf SHA-1: 696f2794fef917cc7a9fce58302933c245d18075 SHA-256: 0e1a2ed8cef1b059786f15a18505039671b8c0251ccc05883720f26e898286c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the links and the detection results point towards a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=how+to+start+a+lending+business
    • http://alhouti.com/userfiles/file/renomesirufovasizeferok.pdf
    • https://profipreklady.cz/www/ckfinder/userfiles/files/53574249458.pdf
    • http://stalmost.pl/userfiles/file/11907381365.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/bdb0728066a15c222fcc660f92871ac4/95660977072.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaf1636ee9---jisenawipuk.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0d7a289eb8b1b6d8050d533e8f2896fb/95637517164.pdf
    • http://temple.mo/userfiles/file/panobofejoneg.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0dd65646153847031745229f891ca900/34532742703.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/v0jrmjchs6v713hh5ocobhnc10/76803693904.pdf
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/vazirorafepisegu.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16087cf7fe8046---39290392496.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/908d8faaa0684f0512f8954e68d18ae1/42929597722.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160816612a8468---27492284240.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65b7c5848c---90147067060.pdf
    • https://netpage.info/userfiles/file/70689299307.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/6460b1e12cfd4590f3a8c3ef1ab2a562/34475727090.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b1884e86d---88691377650.pdf
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210619174129.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d5e0c434c---disasizekavozuwakejipaje.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/n3sljhqmuouprvpl5f42hsi6jg/foweduzuk.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a36f3a1a5d---30211503016.pdf
    • https://arerp.kr/data/file///zetilewokigizisolowagaxu.pdf
    • http://writtenmail.com/upload_images/file/79550047031.pdf
    • https://neplatnasmlouva.cz/soubory/juraselorevar.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b75fdaba3d---78511431104.pdf
    • 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_off0000e93b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 16792 bytes
font_01_sfnt_off0001014d.bin
c72f7fb083fb956dfd57d1e237c28854696689ad6cd9e4cb6c3b81ebacf5ff65
pdf-font-stream PDF embedded font (sfnt) at offset 0x1014D 17220 bytes
font_02_sfnt_off00012dfb.bin
06cffbc4398f801e3dcc3716e9c910618b14f41d6682752fb490253e79ccf2db
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFB 10740 bytes