Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f76c278e1b455d…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 23:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ddea8e44cbce29680fcfd20a1a75631b SHA-1: b7b18bb29f6310ba78d9d05b84e5a189741a66e6 SHA-256: 07f76c278e1b455d8e91f5f13a36833bf24f11ff01fd5d76506ccc83e1157570
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one that explicitly mentions 'free valid credit card numbers with cvv and expiration date'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. The presence of JavaScript suggests an attempt to exploit PDF vulnerabilities or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://coretry.ru/uplcv?utm_term=free+valid+credit+card+numbers+with+cvv+and+expiration+date PDF link annotation
    • http://www.deco-interieure.com/userfiles/file/vexatokasamovo.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/90327205542.pdfIn PDF document text
    • https://norservis.info/files/files/3121292428.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/wozunun.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/ninako.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/77431060329.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__613A849BAF334.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/rutoserirogomotoxuvam.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/7932409256.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/27539096998.pdfIn PDF document text
    • http://machulski.com/public/file/88366451518.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614090e293dfc---kowebaruko.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/reretofesafudinakejosotu.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/jotofejowakudanagotum.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/soluxatogefuxudotuwolo.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/36447468373.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/poxajun.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/lalotirin.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/26623159329.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc2aa0d022---baparezumo.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/laxugunu.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/xonazabofatofuf.pdfIn PDF document text
    • https://suruburi.net/mm/file/11411729104.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_off0000d68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68A 16848 bytes
SHA-256: c008a2893c53073b956bb840e4479fb2b3792da2198ea1c400445d6f8a34da09
font_01_sfnt_off00010267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10267 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7E 11252 bytes
SHA-256: 14952bfc639017e4465ff0f69f40e90a5c76072c8c90f19f88ce2edbb8101182

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