Malicious PDF — malware analysis report

Static analysis result for SHA-256 59078d8bce9fe199…

MALICIOUS

PDF

639.5 KB Created: 2021-08-02 09:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1e67fc6a50abb24f16f8aef3c3053fdd SHA-1: c77fda5dac4b9bf1131aba7eabffcb48b59537dc SHA-256: 59078d8bce9fe1997143813dec5b6bd1ff1fc82a426a0cd74fe05ca02d83f49a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. Multiple heuristics indicate the document contains links to compromised CMS upload storage, suggesting it is part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to trick users into downloading further malicious content, likely for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6289

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
  • 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.
  • 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.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ep2h2ttjecea2hlbvmf7q7umpn/54702062900.pdf In PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26c3c52e33---viwarogijagak.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de86603103---99463521734.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/71329299790.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609bef8f6cff7---gidofomemixijejubuvopi.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/031329213373.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a868254e4d0---medomodofowono.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/ritunupemubupe.pdfIn PDF document text
    • http://www.mediagrand.hu//data/editorfile/61669222679.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089e32b9606f---43873171627.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/k68q53jr2tp2pqe1030780m0ea/patasaperoponisuxum.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/toviwinawimosezejipako.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/modutilavopugoruvela.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/408255762.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd70656641---sabupajeketipunapel.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f514d926797---4135982038.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160769178e0481---natefobosurenukemuvapaper.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efd9ab6fef6---narilovokipebagenozawiren.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/8953330988.pdfIn PDF document text
    • https://signika.pl/Upload/file/82991993641.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e2fe66e75---fewewobejukojotikuxodun.pdfIn PDF document text
    • http://0851gay.org/userfiles/202106file/2021061913141070554.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9920a1fb8---sawase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cracking+the+pm+interview+filetype+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_off000985a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x985A4 11168 bytes
SHA-256: 421ef8e44ee347454f6d8e691f652f825d7a9090e9be732a6547c2a4d89b8940
font_01_sfnt_off00099f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0009b78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B78F 19960 bytes
SHA-256: 65028ed0b5086051889f464f8cbb7df8da40afee1428ca53079700034b4eb429

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