Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5579854ac094a0…

MALICIOUS

PDF

99.3 KB Created: 2021-09-23 09:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f8eb7246f62178ed714170c25dbbd8c7 SHA-1: 10a93a83dc556176bfb4765159b019b8c58af774 SHA-256: fe5579854ac094a06217ec21eeabbd2db9804adbddafdef063f8b895fd5ba3a6
196 Risk Score

Malware Insights

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

This PDF document contains multiple links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed for phishing or malware distribution. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into believing there are changes to payment instructions, a common tactic in business email compromise scams. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with exploiting PDF vulnerabilities or social engineering users to click malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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 http://runbo.net/upfiles/files/16304611017526.pdf In PDF document text
    • https://clinicaalcantara.es/sites/default/files/userfiles/file/giwiwevova.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210919_870D67E5ED96A061.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/39757934000.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139206a7798d---duzodirilodisujugunesewuw.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/56577115053.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/45281135599.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/44239059848.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/4591715470.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613feae1762ec---xugedefuwaxi.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/51877145851.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/tivofonijati.pdfIn PDF document text
    • http://yanartextil.com/firma/files/razopijefovu.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/gomumonenenejafovopidek.pdfIn PDF document text
    • http://immodraft.eu/images/architekten_agentur_images_/file/diselitud.pdfIn PDF document text
    • http://theponghop.com/upload/files/41239202996.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/9591707897.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f2decdcde---84555672005.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143055b328fd---80625377121.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/domosisizumubebati.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109120856062641.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/75520956180.pdfIn PDF document text
    • https://novitas.ro/files/79851378354.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/xorajomosuzutudeg.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/movafo.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/wumowomegotapibaputomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cloning+old+phone+to+new+phonePDF 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_off0001223b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223B 17504 bytes
SHA-256: cfcff798eb7c8e76fa268b85e1885993b3f8adf60181ea6c98c6ba79a98ce860
font_01_sfnt_off00015036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15036 10360 bytes
SHA-256: ba79a27e4e4547e8a0af65ab5981a03fa8c0bab4c765988fca9c29971068c3cf
font_02_sfnt_off0001675b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1675B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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