Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba5b890d5bdbee9…

MALICIOUS

PDF

90.6 KB Created: 2021-09-02 04:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 95ff9f542215630b02ab0a6c88cdb860 SHA-1: 1075e73c324307acd5f4366336c124dc46b9a207 SHA-256: cba5b890d5bdbee9afcd68725af800f0088676d01296eac3503c71dc0cf3a409
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by multiple heuristics, including a critical alert for requesting recovery secrets or private keys, indicating a phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of embedded URLs and the nature of the 'SE_SECRET_RECOVERY_LURE' heuristic suggest the document is designed to trick users into divulging sensitive information, likely for financial gain or account compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://prcomponents.com/ckfinder/userfiles/files/bitodowajinabemogisewoneg.pdf In PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/sft4h8p3qc49a888k6ioesmj2a/xidufogelusejafodinirono.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/bixazutetok.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/meet00t80ec7h4bnugthp7dj3s/lobexuxodobevofi.pdfIn PDF document text
    • http://packamate.com/userfiles/radagiruzudeboxo.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/56270176279.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/jk8qf3l27695ubekkdn907g47v/76485649789.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/91999942142.pdfIn PDF document text
    • https://cargotavio.ru/files/file/xuruvipibabetowabo.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d727ee528e---97527221715.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/bijevevafoxodema.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/17683649154.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/zuxunivisofupaneline.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/wolemisazagofosan.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba384f193f6---27461033935.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/1628236092ef6d936cf77b8d5b2b.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/fe026337b121375e7af3f60372eb94c6/terawatonubu.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b823c2021a0---29164098176.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/zegowonizuluxad.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/budodawi.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2a1314994---15930645631.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/91546938789.pdfIn PDF document text
    • https://aaaxxion.info/images/file/kosewezaze.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/dasinekopijima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=password+encryption+and+decryption+in+javascript+examplePDF 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_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 11172 bytes
SHA-256: ea1093ac06bf1ca174fe5760fbc22371d5bd34a6677cf4f49bbf68a9aca36189
font_01_sfnt_off000114ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCC 17924 bytes
SHA-256: 8b3418c5068dabb4df5418ad3af78f61da552b255f5f1a6e0ceff1a621f9c35d

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