Malicious PDF — malware analysis report

Static analysis result for SHA-256 54037120b75e769d…

MALICIOUS

PDF

83.2 KB Created: 2021-08-17 08:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5b3312b2af0c9825fb0a28703c0d0271 SHA-1: 62450d0f9cac6ef44b87f8e1602f5a597b13fd80 SHA-256: 54037120b75e769def9a1681ce3459d74ea4ab95bb3232a9891adc125eb79203
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, which are likely used to distribute malware or conduct phishing attacks. No scripts were extracted, and the document body was unreadable, but the presence of numerous suspicious URLs strongly indicates a malicious intent.

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 https://vildmarksjagt.dk/userfiles/file/xobubivoxetadupugirigogib.pdf In PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/devomajajat.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/75930145617.pdfIn PDF document text
    • http://budka39.ru/files/vijetawojoporib.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/43609984126.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/11774763790.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/49417287875.pdfIn PDF document text
    • http://shadesvalleymounties1969.com/clients/868959/File/34517830318.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f37f5c407cf---5587992242.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/50309514222.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/voralawenonomimiduvovi.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/gogixusewuxak.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085412436030---99911069689.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16090149b8f51a---35026738.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/zefefigatukefibegevome.pdfIn PDF document text
    • http://thepducphat.com/upload/files/fetatase.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/5fee4267e58183b73e9e8da772c6d2e5/jawokowe.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/vovewidatebubaloraduru.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/rorexurokiwoxanonena.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6c2cd4fcd6---nigiguburulaxejapixosuwu.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210629214422_sya8jm.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2036a44c9---40192847435.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/bogumopigivisaposo.pdfIn PDF document text
    • https://service-panev.com/userfiles/lunakubirobatoka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=traffic+racer+apk+para+hilesi+indir+son+s%C3%BCr%C3%BCmPDF 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_off0000dbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD1 11032 bytes
SHA-256: f06160ecbaa88e00f1ab33183cb5ec72e70281340df3c01a49b07590e631d9bf
font_01_sfnt_off0000f52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52A 19152 bytes
SHA-256: 30eefba48d31cd3696636da9013f6fe3c5503c105f4450ca074fb9449d5577e8
font_02_sfnt_off00012485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12485 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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