Malicious PDF — malware analysis report

Static analysis result for SHA-256 39aabb397917e859…

MALICIOUS

PDF

70.7 KB Created: 2021-09-14 04:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9ae38b4f1d994cb1221a6d86050b3da7 SHA-1: 97c0bbb857be1dc7379d6c4eae9f9fa71aca3afb SHA-256: 39aabb397917e859b4e437c63d58f5e6e23652800dcf95bf6a40999ec092bbb6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. The primary purpose appears to be directing users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5522

Heuristics 5

  • 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
  • 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://anael.fr/fckeditor/userfiles/file/48599929564.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe4acda6a5---taxomegabiw.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613750f6b774e---93367720448.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/jajopuluramemoregate.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/60636361211.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/sofikapowemilo.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f5a4d265d5c600de1351ed4aa113565b/gabegizepijuledeka.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b91e900d07---13074095070.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/safedexu.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/fojupeloguzi.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/vobudubomirawuduvupetanol.pdfIn PDF document text
    • http://npas.ru/pic/file/42371718043.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/rakevoguxabudipisovodi.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/57080936174.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161348532da76b---patevamiwi.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/wujonawulatenif.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/k4jr2n5f5j7jjsgde841qg8v8d/96562737726.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/32828075356.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/85688937029.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/98364876486.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/denutebemur.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/35607690803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=4+agreements+book+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28A 10916 bytes
SHA-256: e61a89c4ea5c8189069bb06432ff6f0b13f6149ac80a5c73afc5c14c779bdb6e
font_01_sfnt_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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