Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c2e9a8c17aa8d6…

MALICIOUS

PDF

81.2 KB Created: 2021-09-20 22:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 511f178595599c8660e285bba0ea91ac SHA-1: 4dd4a255e60b2f81ac8f619793ab8dea5fc88e48 SHA-256: c0c2e9a8c17aa8d6ccb402274d3e5bbd7d163d14f643224eacdbbc09db7db2bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are associated with software download lures and link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing attack designed to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=download+idm+full+crack+2020 PDF link annotation
    • https://elsadaulte.com/ckfinder/userfiles/files/97503718252.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/80902118331.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/50620685424.pdfIn PDF document text
    • https://orrizon.ru/images/file/lazesiraxiro.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f511764c1a---burasijagudidodegewexanez.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/15460807251.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/38205828925.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614058513b33c---73432034686.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/30852619558.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/mavukixuk.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/jozel.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/vujasuba.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/suwigazuzosabokujutu.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/ziloxadulefuliwunexosuse.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021090723570688.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/16087743870.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/dirufuwemipope.pdfIn PDF document text
    • http://skalamatbaa.com/userfiles/file/ximamusewam.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/18355134935.pdfIn PDF document text
    • https://mimpishiosatu.com/contents/files/vivunelibipulewuxi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC22 20500 bytes
SHA-256: 76488677e90adfbb8f5e32a5eec26c42e81587ceb65dcf4c49355f603b0c0d16
font_01_sfnt_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001086e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086E 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_03_sfnt_off00011e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5D 10760 bytes
SHA-256: e03eae33e0b17d26c297ce324ff302e97f8cca8b948e5b5b189749beb81c273f

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