Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c7ee10802c0417…

MALICIOUS

PDF

100.0 KB Created: 2021-08-03 00:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e1ba618d8f5ffba66c659f3326abb406 SHA-1: 942d01d3c630018967cb04c41518c45e56e7a4ca SHA-256: 15c7ee10802c04177348c549dfdf842d6978b9a64a77902a443e215faa1f3bc8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content is designed to trick users into believing there are new or changed bank instructions, a common tactic in business email compromise schemes. The numerous embedded URLs point to compromised CMS upload storage, suggesting a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bda88b7e16---mejivujakipazusalibexo.pdf In PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607668cfecfdd---wejine.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/kowerodupudabikik.pdfIn PDF document text
    • http://timebymtm.com/upload/files/jetupamukasewon.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/19bc7499e8d377879469f1cd2b7568e0/32090454870.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/gmiutonnbohtk6s3vlb3piecp3/35388272773.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/17064591797.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/wizusix.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/d2917efd9cbfa7ad7c74dd22f1436d5d/zisarageponorupazanulide.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/85103802057.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/95eefa82cac70d755830ea364c15315c/40904484980.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/4831150027.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/mawupegonumuzanig.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/d594b3ec457795395f3bc8cde5308762/tulazavug.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160732fbf488db---14458612880.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/8a2302d822a541a51903fd2d378439e8/kuzuvubofek.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/20189726012.pdfIn PDF document text
    • http://vladekoservis.ru/files/xopabogevevin.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607287d497f7b---47752543436.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4e3a0079f4---27961967853.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30c498747f---fagepakowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+talk+to+someone+at+wv+unemploymentPDF 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_off000120a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A2 18516 bytes
SHA-256: 286b06a40b4fa4fc60992cc1fa2b20995786ad92e2181bdffb36321ef0d456e2
font_01_sfnt_off0001512e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1512E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16945 10668 bytes
SHA-256: 8e10b450af97138999761792ca61734e2bad5918182872bfb92b55ef53849c68

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