Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b0208f30ee8a2d…

MALICIOUS

PDF

90.7 KB Created: 2021-07-13 07:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 475d52a7c0c48c7269f008f1698fe19f SHA-1: f70b3bb84609ffb26ac0c6209e5332317a936f86 SHA-256: c0b0208f30ee8a2d628b439583a7a0666c51ea166c410e6db4ca8ab86b7953e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs indicates an attempt to redirect the user to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=cv+junction+anomaly PDF link annotation
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9d94cdoc42es0cg9flksj6uvgf/76325362839.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfa3d4a8d9---nuvariraxal.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/xumivufu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c43cf1e6342---2998160821.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/5ef3626e7e7cfe25fdcfbe667f90642e/98153362647.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/23000807581.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/9a840853c2a508dbf694b55b724bcd1a/sizewe.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/fe0c5bc95605154d7bcf0ac7e2736f7e/tepalawapen.pdfIn PDF document text
    • http://brukbet.com/user_images/file/menasazaxubudikuxaf.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29f871523f---jozupademona.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/fimuzop.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/fogavot.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/fovolakuge.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/2289095872.pdfIn PDF document text
    • https://lemanssrl.it/file/sukubixi.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073fd3eac6be---69464725931.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/mopenepelup.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/55a492895bf60b5d1ff3a46a33abd692/47434263733.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/00340602f615517975ef8cf249dea6fa/rufonatuno.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/94269268539.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160939ee54d52e---97181794647.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/73220624991.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc1026f430---wepuzajilifawopojapij.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c4032c28325---30209280518.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_off00010235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10235 10432 bytes
SHA-256: 6424e2f372aaa1d9098ef3cfaa6150993664a2ef6d62bf83bc8c2a471bbd8262
font_01_sfnt_off000119d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D7 17136 bytes
SHA-256: 6ccbe04d7d8bc3d277d1b8a07c6480e54c21c70b01e52a2d3147fdfba7025cbf
font_02_sfnt_off000145c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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