Malicious PDF — malware analysis report

Static analysis result for SHA-256 8978d9689cd14ad8…

MALICIOUS

PDF

74.1 KB Created: 2021-09-05 23:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ccac3df48083962d9d154c28a50e27c0 SHA-1: 13814c3db9bea80520078ac3e9a4151a92adb392 SHA-256: 8978d9689cd14ad8b05f8d2d8eb4452175aaec6b0da29102cb195bbebf441cc5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It functions as a link farm, containing numerous URLs that point to external resources. Several of these URLs lead to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of multiple distinct hosts and the use of UTM parameters in some URLs indicate a coordinated effort to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://myblindz.com/fck_user_files/file/15069421899.pdf In PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d69fe4f889---mozaxakebomijabam.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca1d269ff2---11300135015.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/ridotadamozaxodisibonuvut.pdfIn PDF document text
    • https://codecs.ro/images/file/wuvitevigik.pdfIn PDF document text
    • http://francisfamilyreunion.net/clients/870293/File/20033602027.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4a756013d9b90d4aa257201079ac1f13/30498515545.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b65aae4c---72426524511.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/16347153985.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e8292276adb---nekuxosepebologuxigire.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/28421081592.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10a23813b---zewenenejupoluzitewi.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/tifuzonosoxeworu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d1f53f8fd---41127227449.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/nabugidevuxula.pdfIn PDF document text
    • https://trieurodata.ro/images/file/kezatorix.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/xalotewanevidetazuwifapax.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bc7c95f78a---dekafotosapidil.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/79371867827.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff52aa93b8---rewexatelodut.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/41057905265.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/646a685826a5dce40487b666173e97a1/woxajogeli.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd740bec339---7873947416.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/30605083659.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/xopow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=hyundai+elantra+2008+repair+manual+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_off0000be0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0A 11024 bytes
SHA-256: 8bd53c9a7007459ad3a28754402abb3a5646a549f39f158fba88e48073e35e68
font_01_sfnt_off0000d7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AD 16540 bytes
SHA-256: 381e9efd97e798bd1c4b62b6bbf8453f35237d92afadee7b18ebdb3c51769961
font_02_sfnt_off0001023d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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