Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a463c1470d86502…

MALICIOUS

PDF

74.8 KB Created: 2021-06-23 04:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 12d08425b63989be43e981be73818b36 SHA-1: 242b9e8e5cfc893d04389e263909b5f83fbf57f3 SHA-256: 9a463c1470d8650240987857542fa9328e1b440a3ad9c2f516cf00a006482dd2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8363

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://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a070accabf---zepedapi.pdf In PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65cb276c37---427021459.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/431feba9bb7a1a3ba2775119e5816835/7215563254.pdfIn PDF document text
    • http://envigest.cz/upload/file/23484310078.pdfIn PDF document text
    • http://abpaluso.com/upload/file/15319209777.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/vvpcuhkl06slvu9jt2s4rm8idr/noxaveguwu.pdfIn PDF document text
    • http://armanetti.com/images/samijos.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad246f3d6e---jirikelejafi.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/880eargm5gni6bufsv8opmua52/rodogafituxewu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c0d05b986---85608630714.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76fe14e5f---gifewesupinakidamo.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ohgcotsc13cv5nv5t9clf44d0v/23342029731.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608a971c81a44---59181167094.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6724147b38---periwamujotow.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075df376f165---90337745049.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/dibexe.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/rogipireberulebun.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab209cd532f---refemizanetuv.pdfIn PDF document text
    • http://bogieclassof67.com/clients/71235/File/86169855081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=nds+emulator+iosPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001170a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1170A 9316 bytes
SHA-256: 4b519206272ff8e67de3f479bc7788f1aed475c5240d9eef56e429a9564262be
font_00_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 4716 bytes
SHA-256: 0c406bfb27b78dfbc0d80113e67f612c6931bba99f31c7c61f48751da91695a9
font_01_sfnt_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 11256 bytes
SHA-256: 5d64ccb43024e69a8012713ae3200399007eff1aad2defe0ae829007dd19b8ac

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