Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b1383e766194ec…

MALICIOUS

PDF

84.3 KB Created: 2021-06-28 18:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d502d94ea2b218aef94a4a75a4b1f80 SHA-1: e1282503f4b2d76b096bc113f7e992ea9b8f8631 SHA-256: 23b1383e766194ecd339f1038528b2a865c9d2152b4068b991a37e07d7f91815
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links to potentially compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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 https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/a9ea473f528742bfba51d996e0b62b27/27936567119.pdf In PDF document text
    • http://aceonlinementors.com/userfiles/file/8037204304.pdfIn PDF document text
    • http://turnyras.lt/Files/file/lavaxikagivolirifef.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/6cucvs106h8irq2o0jj96u236m/rixebodusekoxexotajonuwak.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/i8g60sht6e7q4bkr12a5pjv701/33179351333.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/bixififefudoruxedifapip.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608227168eb30---funawijaxevutowigitimuji.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/10992697208.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609dddc16c577---97167492205.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b77ec08bebb---nupekemitu.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd3cf5f6c5---6819109270.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6dacd326d---fepenajunoxenodo.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8c71c02dd---bavudavafeken.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/raxifokitibusujeleso.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/29446711455.pdfIn PDF document text
    • http://mcutech.net/upload/2021/06/file/1623840239345094966.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/1d21c3d6834add4a79ec7a435e70181b/65258671432.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b290820f50a---89325586946.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/17920709524.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/biguteb.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4e2020f7f23c74730e5b317eedd19cdb/purewojuvomejogulobige.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/tifezoniwavogunovulipene.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=dangerous+crossing+cause+and+effect+answersPDF 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_off0000ddc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC6 10792 bytes
SHA-256: ea6e5f1e8d27a9231cd920c17185a05a5c6a28783bb9d1f107d24cd4c09414f0
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 20448 bytes
SHA-256: e80e2f104f71d7ac19eff08023f6e80e1921da72595bde484ce781fe9eb95e50
font_02_sfnt_off00012bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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