Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fd6cc8c6f60ade…

MALICIOUS

PDF

69.6 KB Created: 2021-09-17 06:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a733c6ea8df531d6ccf0326935880549 SHA-1: 1ef6154762f20ea96132beac8bf442be42f83d17 SHA-256: d2fd6cc8c6f60ade1fceb5e998816dd3313c3312e1808b2a99a02ce13473178a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=how+to+import+contacts+from+iphone+to+android PDF link annotation
    • http://hissekurban.com/resimler/files/suseru.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/gifebamefalafaxup.pdfIn PDF document text
    • http://c-six.it/userfiles/files/jogunubozupurisubamo.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/2119723663.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/zemagojumizodopet.pdfIn PDF document text
    • http://rilta.net/userfiles/files/naxebumedagezewajelafa.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/zakewosujixupowizigafixu.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613582e970b8b---ramapagaruvuxepupepupoliv.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/naber.pdfIn PDF document text
    • http://rideco.hu/upload/file/jawivo.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/demerosorexivujarofeda.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/vijowidoxumumujonuwuwu.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c020ad2c3---pezijikonop.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/57584485456.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/bisif.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/34385574061.pdfIn PDF document text
    • http://progetec.org/userfiles/files/taferikej.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/52804834905.pdfIn PDF document text
    • https://solturism.ro/images/file/13627340893.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/82232978873.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/fakubadefeja.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/pirosepid.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/gekafudatofovole.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_off0000b192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB192 15032 bytes
SHA-256: 73d63dfc98c41a9e0608e2f68add25fef140c1a4e2aaa1e4dc12817196d6bfad
font_01_sfnt_off0000d7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B0 10916 bytes
SHA-256: 27b15a21b886fd5f1e1808cfd66e54b15b990e91d4c5f689dfff095bf61d837e
font_02_sfnt_off0000f0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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