Malicious PDF — malware analysis report

Static analysis result for SHA-256 119bd413c95efb6b…

MALICIOUS

PDF

88.0 KB Created: 2021-09-17 12:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 53bedb51578f80326c4560603fe62e55 SHA-1: 56bd97c1c8b11dee03f39e3f2381ad5f0b85d1ad SHA-256: 119bd413c95efb6b7bbd017acc3d77336e2509eeb12471f302275f9b4d785916
204 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. The presence of embedded JavaScript and numerous external URIs, many hosted on compromised or disposable domains, suggests an attempt to redirect users to malicious sites or download further payloads. The 'Remote-support tool lure' heuristic indicates the document likely instructs the user to install or connect with such a tool, a common tactic for phishing or social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=wwe+smackdown+games+free+download+for+android+mobile PDF link annotation
    • http://semanbio.com/upload/files/sibajovifananuxipuba.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/ribego.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcf13c9d81---vuxakofuv.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d27d27c6803eaef7369cd70987230392/59568773143.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424e3e91702---80865430034.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/jalelabewimujen.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/jodilenazumapadibire.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/paviponexiwugizo.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/42384249408.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/89251589633.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/naxewefibufisezizi.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142541e82bd2---vapeso.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/48885623316.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/pevapowem.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/58777166551.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/juwuk.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/57885287658.pdfIn PDF document text
    • http://ekmeta.lt/failai/file/putuwew.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/romij.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/nidawuto.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/12450597533.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/gusufifijovuk.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/muzumi.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_off0000f2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 18024 bytes
SHA-256: 13df39bdd9b022a0e4a025912f52b8de19000fdcabd4d657aee686bbc0641deb
font_01_sfnt_off00012115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12115 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001392c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392C 11032 bytes
SHA-256: 41c3f7124427157da2c275364dd222781a43344392e85f0f77634bba200b320c

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