Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68b2465b9c59841…

MALICIOUS

PDF

82.7 KB Created: 2021-09-14 10:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 626bc26fb2c7c31a631e92475f76bc04 SHA-1: cf59cef704b0ae8d0bec986c75f61b5bd3c7f940 SHA-256: f68b2465b9c59841a363e389cb51764da1282ac180ad01feb4add05f40a765df
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. Several heuristics indicate the PDF acts as a link farm, pointing to compromised WordPress uploads and potentially disposable hosting, suggesting an attempt to distribute further malware or phishing content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://banerjeetourspecial.in/ckfinder/userfiles/files/42521739532.pdf In PDF document text
    • http://panel2conso.com/userfiles/file/95141703050.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/3785060692.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/wobufaxasiratawego.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/najesenanenix.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a24e5e54fca39f7102ff363280e01e2e/vesozagoraboseratu.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320093b2b2a---sonedomusaxogo.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/77269251197.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/rukijomotavudo.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/wuvilinalisade.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/majuweb.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/73228712188.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/32337329180.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/67828062353.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/gozigive.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/lakowal.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/xulogan.pdfIn PDF document text
    • http://yuha.be/_files/file/24971699583.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/29918572898.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2ad193459---vasamak.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/lukubifinelolelazaxukum.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/51233455793.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/56323572587.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/1a83f7513766969a381e2f5377c4c4c4/mevukokokaturore.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/nifebolivibajojaxubozuz.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/10345755911.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16139f5b7e6fb4---kobopexupamuwitema.pdfPDF link annotation
    • https://puntodeplacer.com/userfiles/file/57094729164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=wink+video+call+app+downloadPDF 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_off0000e171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE171 16968 bytes
SHA-256: c58fabae338e48445a5424fa2ff21710a35e9661341d3b650d837ea7a7564bb2
font_01_sfnt_off00010d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3E 10376 bytes
SHA-256: f1051f305cf921bae7afdeeb479b8b927b7966c84d1f24a3f41937059fadbc75
font_02_sfnt_off000124cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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