Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ce60a3aa015216…

MALICIOUS

PDF

67.5 KB Created: 2021-09-28 17:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c485d1d966b3bb16f3783b018e02ab0e SHA-1: 13d4f06b5a22ea172993e5cf67ebdbec39fe7144 SHA-256: 09ce60a3aa015216f615c6b87773c9beba8dc5a056f5c8107b797eb2383dd9f6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection. It contains numerous embedded URLs that redirect to external sites, suggesting a phishing or malware distribution attempt. The PDF structure and the presence of external links indicate it's likely used as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=fgo+na+apk PDF link annotation
    • http://www.somdattabasu.com/fckimages/file/61692970034.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/xajab.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/kavowiserujegaxixodekas.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/99875350350.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/kozowerupapomez.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/bixolobabumojageba.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/deperulafapapor.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/kusexovesulizusabev.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/xabimatiriripufos.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/35497345806.pdfIn PDF document text
    • http://shopabrang.com/images/files/28390708307.pdfIn PDF document text
    • https://maturana.cl/upload/file/wageketogixeno.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/jobasiwiva.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/81592279458.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130354b1e4db---jewodevifero.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/80998815605.pdfIn PDF document text
    • http://hstechno.com/userData/ebizro_board/file/wiwawut.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/kijimalop.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/difasigasuzibis.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/totupurunogifiji.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e09107888c---95769753733.pdfIn PDF document text
    • http://uhorder.com/upload/files/pefirukajuloxelovu.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/vofetisowo.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109150719273320.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_off0000aed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EE 9860 bytes
SHA-256: 24f09e3aa8704f506ac868c3dfa36fc303ca1cec75e856c6a120373599a619da
font_02_sfnt_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 14624 bytes
SHA-256: 8e3b7d9b4c84475f5adc48e0cefe36bfacbf946af8e2e12018cfd41085df182b