Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d9824f441bb986…

MALICIOUS

PDF

86.2 KB Created: 2021-07-24 22:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9898bd4d9084956ea5f6fed725d78806 SHA-1: 47b0fe7bb7737b577470c1b67d1aae3eafd1a9ea SHA-256: 06d9824f441bb9867000f8d3a9905e48cf3808bba239a4a0191f2e6014c4be79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources, which could be for phishing, credential harvesting, or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/688b0f05cff55e79a2a0253422eb3c9a/24691192153.pdf In PDF document text
    • https://liniagdanskzydowo.pl/files/vaxuwupugibamopovajitonaj.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/21264028301.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/77709791884.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/20113010300.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f623aa03aaf494a99b28d580c1e2d709/budezoje.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/9e23e1dbc3f0bfb00011b779dc745ce2/fodiponozupoxuzerejijuwit.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/niraka.pdfIn PDF document text
    • http://deauville.ru/files/file/xojuvukuxe.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/lugejoz.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/jurigufimo.pdfIn PDF document text
    • http://asfalon.com/__files/file/43152172481.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/788ee08227567344f334768bf6ec1823/guzogofava.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b35f77e2ef---24794926287.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/u0pi30bg6c37dhd75sbrfdfno3/1192672922.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/gtn1h65prepjl6vrvetmrhfuod/13459164711.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/73459369593.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a14419a21---waxedesujosot.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ttnm9un17rej885bm279rek2e0/94824652471.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/juwasenasususimanivi.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/morikejirubu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+cheat+and+get+gold+cards+in+coin+masterPDF 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_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 16996 bytes
SHA-256: 4594509dd9930b3159010ce51c302da838fa12bd37b0769a688816da1ec1bf41
font_01_sfnt_off00011932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11932 10896 bytes
SHA-256: 6d6cbea5f4cac26a502283c6921ff5f63bbb8c2f140816c9ccf2bab3e2a8d537
font_02_sfnt_off00013201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13201 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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