Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d697e7e0a7029ad…

MALICIOUS

PDF

85.1 KB Created: 2021-09-02 23:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1d5d598233512b9f029972998e64eb8f SHA-1: bbe25a37f8f7b2665b14b4d3d70287b7b2dfb2d0 SHA-256: 6d697e7e0a7029ad771027e748bfc5f5c0feebfef62ab6a8df1f6de0b9128067
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/29ubanjdvbpf7hfbr0uau87p2n/milefud.pdf In PDF document text
    • http://www.propper-droppers.nl/files/file/38686301369.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/66204864434.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/jewosusakonezoditimur.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/xadaveparigizipugekig.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/e66be773f6b6556ab351765e67281b43/71221048429.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/e79f8c8fbb807ee9bebe8903380a083c/43536160216.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/benalubozi.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/kovojus.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab98e23ac62---40356600257.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/zisere.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/2898902845.pdfIn PDF document text
    • http://vtaky.sk/media/file/baxetogofatorafo.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/52911168448.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160759646eb99d---8722726923.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/88168616910.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/pupomapojatelapatovimiz.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/fajukop.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/39cfd9c442a69b131666c52b026c34ec/80149139056.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/bba01860558ed58f3a741bc5365df2c7/88688395022.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/68486532935.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd9306c369---kisepejumume.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/raluzifajogevenonixase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=tdk+atas%C3%B6zleri+ve+deyimler+s%C3%B6zl%C3%BC%C4%9F%C3%BC+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_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 20088 bytes
SHA-256: 57d86fde577dff87977b72905aa3ef6f2e2dc0fb78eb1def409341c65c2ba3ec
font_01_sfnt_off000111e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E9 11368 bytes
SHA-256: 88574e2e2c2c97ecdc2df62e577448c281be3aab0d500480601c25dd854eb5d1
font_02_sfnt_off00012c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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