Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab7034c404bd42d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-17 07:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f89b229b865d282a3bf40cb3578f206c SHA-1: a991f564016780b783bfe0cdee6e21e69a4aefa7 SHA-256: 2ab7034c404bd42db53e44c87b9ef962c87456dd21acb30a985c9c6d70d0f561
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document impersonates a cloud file-sharing service, a common lure for phishing attacks. It contains numerous links to external domains, many of which are hosted on compromised or disposable infrastructure, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://garglob.ru/uplcv?utm_term=how+to+rename+a+video+on+android PDF link annotation
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/71923448075.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/73828192105.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/33c0a3eb6eeae8c068f11558a751d7bd/kusanuki.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/ronewadijezimuvalaxufimet.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/29892630539.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/49206849920.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/15368841406.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/84090686980.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/lonekakobukel.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/zipimuniwedekoxamek.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/56981811975.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/fakosejadevone.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/83625630903.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413bec77d97---dopisevojodogurumulujone.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/30521565312.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/wilis.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/42273854622.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/xenugukuzevesugerir.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/5d60b018b9f4bea05a140cd14ce6e182/15628445390.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/wojilikutupebuzavusa.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/98067899160.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a98425e6a---xesizagepefanebux.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6340b5f73---pumadetamilemigosorafe.pdfIn PDF document text
    • http://cnzgks.com/userfiles/file///10190605679.pdfIn PDF document text
    • 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_off0000d846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD846 10340 bytes
SHA-256: f1b18487c728121be4e2503c0fa2c588f13280aed3b54626122a3443f5bb9c34
font_01_sfnt_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 19896 bytes
SHA-256: b03d43ba34c93e28edab6c84bdb1fb4ef42a54b8849022e4ba56f8a71d9172c4
font_02_sfnt_off0001237a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1