Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05cef4f8a5cad8f…

MALICIOUS

PDF

83.8 KB Created: 2021-09-20 12:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eae880073208a510cd1228125e96c067 SHA-1: e0d577ef25e9b362ab7f57128918a8676fdb183e SHA-256: d05cef4f8a5cad8f49368d819a0e197d260e45111409a757de454df033e3aa6a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed for SEO manipulation or phishing. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into believing they are interacting with financial or payment-related information, likely leading to credential theft or fraudulent transactions. No scripts were extracted, but the PDF structure and heuristics point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://butterfly-propertymanagement.com/userfiles/file/lasemugejirus.pdf In PDF document text
    • https://gogift-it.com/userfiles/files/93416474555.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/padasibop.pdfIn PDF document text
    • https://sabresources.com/FCKuploads/file/51449418527.pdfIn PDF document text
    • http://citra.cl/userfiles/file/zusunodokejepemitaporikev.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/5962380066.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131cf92b7d45---wuxarix.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109072204297269.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/samozato.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/0683df77e775ffcb93541943cba70d43/93026965434.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/bunafimevigebivimu.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/55790401983.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/fd1bf71c2168931d03d6df9145821402/92474728104.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/tejaw.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/segokaruleg.pdfIn PDF document text
    • http://mutitar.com/user_img/files/majidar.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/falinoxapipo.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/fosunoledewadulux.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145fe73577f6---gaxiwaki.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/1761869666.pdfIn PDF document text
    • http://tcihk.com/userfiles/witum.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/zugejizuxokove.pdfIn PDF document text
    • https://stpatswatertown.org/ckfinder/userfiles/files/kelefalojas.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/95476448393.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+save+my+contacts+to+my+sd+cardPDF 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_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 18484 bytes
SHA-256: 6545049664ca5dd0a989d15f288dca74e02f0db16a7077055a7b15631807abf9
font_01_sfnt_off0001109d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B4 10652 bytes
SHA-256: a3595871d6c57ea6905997766c76cd8213bbc27cb2e157763eb28c201613dd62

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