Malicious PDF — malware analysis report

Static analysis result for SHA-256 c349fa5d62b6bfe4…

MALICIOUS

PDF

82.2 KB Created: 2021-09-24 00:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 26bf70025f5354d18735097612d44aaa SHA-1: 49637e6bf7f9407b3cefc99c2d6cb0dfbdaab28a SHA-256: c349fa5d62b6bfe487bece528e2bd5ec6eb54f3b58de414216b99481c573281a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/mosafopo.pdf In PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16142d820f2ced---rogapezifotagi.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/76861404898.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/jarevodofoxeweri.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/50290204121.pdfIn PDF document text
    • https://docommerce.co/calisma2/files/uploads/98425853362.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/xigasan.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/janutanejefi.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/nuteselite.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143cfa744f82---42981387110.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/37246137786.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/21476133990.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/nikopebefolugenupevup.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/19210352278.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/pitojotakowukivom.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-20/images/files/mizewokumaxenosapat.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/9818d8cf7dc7f7866b0c3a90ca1be871/81945715759.pdfIn PDF document text
    • http://lovesenergy.com/file/noxuzaxiwozison.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/vozipedamop.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/guzufesuwalij.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/nokujabupedopuj.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/99734461023.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/78729451690.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0d9c20b9af8da6ea1fd849d7d94af7ee/fegatikisubewowanuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=one+piece+948+watch+onlinePDF 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_off0000db69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 18124 bytes
SHA-256: 70303b6e887621676a59c0a32621af90c21971f37af7fb4adfa11ea5fc3b1d49
font_01_sfnt_off00010a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A56 10768 bytes
SHA-256: 8687e7a59108993b7ec0adc581d1273204883ddc80a5964aa58cae532c180ad8
font_02_sfnt_off00012338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.