Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf3e08a95be5786…

MALICIOUS

PDF

83.8 KB Created: 2021-09-05 22:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 76519f55d726cabe58f97794677b9ea2 SHA-1: 2a02e2f2c6276b133f236b39ebc21b60df923e39 SHA-256: 2bf3e08a95be57867d3ebf7ec5935f4f6d87a61d71281d609250fae72003c0e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various websites, many of which are identified as link farms on disposable or compromised hosting. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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://rotitelor.com/contents//files/18019258598.pdf In PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/kumokoj.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923c8735cad---62800024243.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109050914547879.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/16402794441.pdfIn PDF document text
    • http://anpo.vn/upload/files/xuforurajulifezatome.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b38701e20---40374109500.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/66206430437.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/31796215912.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160ad80c56ee97---11749029158.pdfIn PDF document text
    • https://magatek.com/documents/file/5971209931.pdfIn PDF document text
    • http://elfobchod.cz/foto/Image/file/21551308431.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/xiwokamilifoxowuxaxur.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a88398fac---50352769050.pdfIn PDF document text
    • http://www.zima.snowcat.pl/admin/ckfinder/userfiles/files/lojisinawujiviviwu.pdfIn PDF document text
    • https://10s317.com/uploads/files/202108241558294867.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/27620319166.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/160c04a28f9fe438c3ce0263edafa1ea/zigidupovuwudevu.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782e88044e2---2561796830.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/sekuxu.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/7f9f65d22c5f65d726e97e200dbb34d9/wunoxejoketuzid.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/35c945a290ede4349d22ad13032829d2/70966387034.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6a82a7020---noxipixonopizenewebunifuj.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/migor.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/98179793567.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef41605b2a---78220068203.pdfIn PDF document text
    • http://trinkhorn.org/userfiles/56364953093.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/2rftl2apd6scer9efebit0djmj/pamisanadoro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=escala+funcional+de+karnofsky+pdfPDF link annotation
    • 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_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AD 10804 bytes
SHA-256: ab94bf6975b0b776f70f025d2e9ff0710de958b0f2aaf52499c6b78ed554ef78
font_02_sfnt_off00010eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB3 19532 bytes
SHA-256: 8cd1cf0ff125c346e4230a93e2dc67582b091e6a9282099ef3fe5ae02acb32c4

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