Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02bac1b5d80f1cc…

MALICIOUS

PDF

80.1 KB Created: 2021-08-21 21:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 591483ea42580ea26d7a22f941fc7506 SHA-1: 4ae4f11de7a2d4b945fd8c26c0354957d855ac14 SHA-256: d02bac1b5d80f1ccb201987fc6161c310d3f3030df352b53a9862a481e03a7ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised or disposable domains, indicative of a link farm designed to redirect users. Heuristics suggest these links are used for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=la+ley+del+espejo+en+ingles PDF link annotation
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/38215119620.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160badb3a6b658---fisulotibab.pdfIn PDF document text
    • https://taperagi.com/contents//files/suxepukolebelevovuwo.pdfIn PDF document text
    • http://zae.me/datafiles/file/desobujamefanoxugatomoku.pdfIn PDF document text
    • http://glassick.com/userfiles/file/nufovikunuxoni.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/88718691947.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e257ca1e856---terexufodikilul.pdfIn PDF document text
    • https://bloomeng.com/uploads/mibawuwekaredoxataxuzipup.pdfIn PDF document text
    • http://nietegeleuve.nl/cms/files/75366824676.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/fukoku.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42bbcd1311---xonorutigewivu.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/13898789347.pdfIn PDF document text
    • http://gestioniarmatoriali.it/rumazamefa.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/46157985699.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/62415617101.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/raxewidedixan.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/xeteva.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/81995658526.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160700b5e4468f---21984328628.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/novibuzomine.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160907934ef3e4---baliguwafunowumiv.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/halkjbkmc664dc7pnpqk6d47j4/fevajakafa.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1147ec08d---lurej.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_off0000d60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 10568 bytes
SHA-256: 6b033d65e82dc0afd259b80fdf855417695bdd8bcbbe33a496c92b9bfe79d4e6
font_02_sfnt_off00010610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10610 17152 bytes
SHA-256: b9eccb56b72aa53c7210a3d54693f9443ccd4d44df35d41b4c343f6d708c4bd0

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