Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb60f7e41ef1d6f…

MALICIOUS

PDF

79.1 KB Created: 2021-09-03 09:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7ca16afcbcb340d936d36ba2529a4f3c SHA-1: e006126be1ae0c034c44a37a5a711f22d785a14e SHA-256: 4cb60f7e41ef1d6fa82b7d82cdbc938b8311f0e8b4697ab86c4070cfd466117b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous external URIs and link farm heuristics pointing to compromised WordPress sites and other domains, suggesting it is used to redirect users to malicious content. The primary purpose appears to be distributing traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://pistant.ru/uplcv?utm_term=auditoria+financiera+pdf+gratis PDF link annotation
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/5e10121696a9fce6ed0902c7e2ddeed0/duwurabupirew.pdfIn PDF document text
    • http://www.toptehnik.si/images/11398924160.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/19777b3c785345a915fe0746ee26f343/jileborikalaxemorigod.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/31c0eb271d0277c8991174613822b7d1/nodadikemo.pdfIn PDF document text
    • http://gdgom.com/upload/file/2106050911339160233rhvvg746dxi.pdfIn PDF document text
    • https://mmszke.hu/files/file/tujejomexopewilarugemoxen.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/60557551931.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/kamunolaso.pdfIn PDF document text
    • http://ge-mak.com/files/52272948204.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/43262954126.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/91f67881c9dd885945fc6e5c9acf6318/21895449087.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/hd2srv0ufro3l4551n18r540hu/74870374812.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/vazusibinomuz.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/latem.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/kowobobinutukirutomu.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/75978479430.pdfIn PDF document text
    • http://capital96.com/userfiles/file/30898275252.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6fdfb9173---zukivomajasupuzivof.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b73b5931d72---13977583483.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/40419388660.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/41638842986.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849c3908453---7267479543.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/86bde55bcbdc3c809600893c7f6c77fd/pabewuxigijemoz.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_off0000d0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C8 17936 bytes
SHA-256: 9f63e32cf88c44e4c91978ab9a61358f33a46d60a45f5d26d54e791cef66c4c7
font_01_sfnt_off0000fe4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4D 10828 bytes
SHA-256: 7076d92d7f827965531f49aa6170361e9cbf60e76879aad5070ed133b8757422
font_02_sfnt_off00011739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11739 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.