Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6709de28d7f3dc0…

MALICIOUS

PDF

78.7 KB Created: 2021-09-07 00:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5f2dc658fd1bcf5b518b4395780d4ec2 SHA-1: abb1c8c5a1bb21f3a0fa14f59f96ab1b39e17af8 SHA-256: c6709de28d7f3dc0981316079e9d842028d74fc9789c337d7ef55f0b0ea467e4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous links on potentially untrusted domains, suggesting an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://synerhu.ru/uplcv?utm_term=tally+basic+in+tamil+pdf PDF link annotation
    • https://cafesca.org/ckfinder/userfiles/files/nokagaganodikotekakagi.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/zezabamesuzose.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccb1d7cb84---77613749403.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/nogujisowar.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/lojoguvafesutizula.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/d61c7b7084712a3d3af3ae800a9848e0/61169827630.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/070552534192.pdfIn PDF document text
    • https://cakkue.com/contents/files/37859306694.pdfIn PDF document text
    • http://webursitet.org/Files/file/napizuxexefidatokomokod.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021052507300964.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/ohudi55rpbkcpql03gdshrihld/keporivatoz.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/981c5bd2e881b52788aa4da83f7d8030/sumotujujajodirun.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/97027435198.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/bec3fb9c873572a7fe93d50610e16c31/joguvotalonetunopawuzuno.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d7f1b5b659010c93c0d1d64b8edef043/98182471661.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/cm7q6oh0pkfl3u31hk041mcik3/35944441316.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/62481833802.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/vovozedisolawafoxop.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/famowiduwonoxa.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1f189d679---84861240367.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210812215155.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/rafobofatud.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/danuduvomewev.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9a6cbbe8a64bb89df6fbe17afeae8d10/32239054439.pdfIn PDF document text
    • 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_off0000d05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05B 10648 bytes
SHA-256: 629cf0a5effb4c5ef2c4a156febf6b9c65afe2e817e531f726500652806e7be8
font_01_sfnt_off0000e882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 17316 bytes
SHA-256: 79b0baf95030277094dc5140fd000c8ed59b2b182ce3a22155e3a7e79f00de45
font_02_sfnt_off00011599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11599 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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