Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed11a0e268cdf3c…

MALICIOUS

PDF

97.8 KB Created: 2021-08-09 20:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c6166e4b39e4cdcf8dac7c20049ae535 SHA-1: 98e988ecbc163c18a2107eb4570e70e5d5d547cc SHA-256: 0ed11a0e268cdf3cb6169f3bd0398a6074af41a5e3a56a8cdbd903b0e6609613
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, 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 structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/0dce491ff11e30a907d48a3f5af02c24/98093557538.pdf In PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608248b511c18---2533368884.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/25018956257.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/fetudenibipovitopavet.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df5f34bd6d---wexanedivoxasavuxisixifo.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/6tl188m6age5r4utkpqpj59760/kokiseniz.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/efd16ec7b6e848f39a890af1b651111f/80416654017.pdfIn PDF document text
    • http://nfc.soo.jp/file/losavaburo.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/fbcf58992919744adc3e6d1bfa3cbb40/vevelimujudevevemumuxi.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607177c21a9a7---24076861970.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/up8k83a52sr2atjd9e59ql5pv7/25124601262.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16093e579f00f9---vagulowakolulotinapijepek.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab39f87ce4e---82686823251.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/24334029878.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/lepopixojuxuwivajidid.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/61287249203.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/8df2ae823dc1f893fe7fdc1d09cf5dc4/mazidobisoneperepexubos.pdfIn PDF document text
    • http://zae.me/datafiles/file/6957952069.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d54594726b---35113638491.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-25/20210625152354978586.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/jokawafi.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/nusedugokuzexesoma.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1627885531.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/4397756052.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=good+communication+skills+pdfPDF link annotation
    • 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_off00011d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D58 16844 bytes
SHA-256: 618bc56daef0da0b27314355e2052315aa12552f208203e7123e91e9c90e927f
font_01_sfnt_off000148b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B4 10780 bytes
SHA-256: 1323e3a487bd5e05816737bf75929ec75c2e3fa76d55e88fafbc058d0e94ce72
font_02_sfnt_off0001618b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1618B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1