Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d19925c4b171967…

MALICIOUS

PDF

99.9 KB Created: 2021-08-15 14:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: c32971a03e26e0339e92880dee950251 SHA-1: 3d4d5716fe9d78a8c55df21d8b6d88cb2b1f61cc SHA-256: 0d19925c4b171967335671c9aecd6d5635f25280347c0542f9714a52f7ac1676
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://catamma.ru/uplcv?utm_term=how+to+get+minority+certificate+in+telangana PDF link annotation
    • http://sunnysolutions.it/uploads/assets/file/6622832704.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/4535065e3cbfa7e21d290624bf811961/10684110783.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/0b9ce79eecde93f7bbaec260fc4a8ee3/xodirugamagopadutozafebit.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de092ce6b---8686926811.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/1b52c94a957409b2f9394ff1462517b1/nizirefevubitelejegav.pdfIn PDF document text
    • https://memoservicesrl.it/file/24841863888.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/warezalalutal.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3f147fbd4---pofifa.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/piduxojufisifijalixezipe.pdfIn PDF document text
    • http://ezibra.pl/upload//file/xujanojafotanuxivuxijo.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/30991405438.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a84e88dc65d---gewumiridogimobifewax.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610cbf7188683---sibelofiwafute.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/43558190236.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/mav4bnlbe9luvpk3jdti5n150j/wefirulud.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc7725f46c---danowokiwemebetuketi.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112f884167f8---nigulatubuwugebezoliwaw.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61379b7152---393221252.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/79762505341.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a889be02fa5---xupisesa.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/famujapesugufulu.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac37daa09c---12931959431.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090b5f673fdf---rujufezuruvujem.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/14542029539.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f24754c9c---sekuwoko.pdfIn PDF document text
    • https://ikima.fr/uploads/file/89715191245.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/55587660045.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_off0001216b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216B 17696 bytes
SHA-256: e5d685c599188b3e76398f9d87456b5ddc09d350a30e5a250c8a12777682ee90
font_01_sfnt_off0001501e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1501E 10700 bytes
SHA-256: 45b84b176a4f7471138e94696c91e31b219fa36121dec5b71910974af38107f0
font_02_sfnt_off000168b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1