Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14a8305039abd4e…

MALICIOUS

PDF

90.4 KB Created: 2021-09-04 03:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 11cb364b464ad7bf35ea362ff8edc063 SHA-1: 67d60cfaaa3ace0118f0451ddbc5af5c9b57ce3d SHA-256: e14a8305039abd4e00ff0afce37f20c15768b6029dd2d9d676c2058db29f8198
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised CMS upload directories. The primary attack pattern involves directing users to potentially malicious content through these links, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://implant-drill.com/userfiles/file/67575040166.pdf In PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/bf3ccea3f5c25253cd4a09865dcd3839/zobovizeropaxujisumivo.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/78255554723.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f50c0c95c2b---lofeborex.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75939471863.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/rilixodajuko.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/remubogojipufamuwafikaxi.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/45856980398.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/2723434320.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/wozidiv.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/gupefepaxizedam.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/c68fc66aadf0945dede92619b1e984e8/42836321576.pdfIn PDF document text
    • http://allycatering.com/userfiles/99287919833.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/34703081370.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b89b8bc25f---xakaxajotiw.pdfIn PDF document text
    • http://dogable.de/userfiles/file/24544829035.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160dfca57be05a---wemavebutumiralazaf.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859c9f3d57b---gamasilixutivanopovo.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c79e7d9e0f---pipapejepejazisirej.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/80505744827.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed9c541ed3---jemijivinewujurobe.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608580e293289---22139622676.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/16758707169.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/60580217116.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132b8745b5b4---lonukevuravidevabatoxiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=janet+mock+redefining+realness+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_off0000fa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5A 11044 bytes
SHA-256: 0a81138d3ea090644998a12d6df926c85747ebbbd26955c77209d16c4d094cee
font_01_sfnt_off000113d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D2 18492 bytes
SHA-256: b8420998c3c3f158f49dc33cb9bc74e2e833d09984754435fa0f1a0a401f86fd
font_02_sfnt_off000143b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1