Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0edd1d73c449b97…

MALICIOUS

PDF

82.0 KB Created: 2021-09-13 18:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 674a48471384f65e6d1b67485eccb1a9 SHA-1: e6cd16995e97ca53a70f40565514e02d3702584f SHA-256: e0edd1d73c449b971525424179721919ac499a65275c7bd3a59c565d1b7d575b
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a QR code lure further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pileshoppen.dk/userfiles/file/8242305629.pdf In PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/kapawitusuzoziz.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/d05pavs2i9e3a58pp3i57r53j7/lilodokenuvujemumajom.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/sobanowezag.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/69195290741.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/remelakutozipugofujad.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/banukomemukenobupusufam.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/kisutapogugutilo.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/2cca65bbd0f05733c5c67ca814e7b839/64833662095.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161399642dadf3---15774071521.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/98968560757.pdfIn PDF document text
    • https://vitanov.rs/files/bebafuwozovuga.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/54023073360.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/11696933171.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/7fca1b8fdfc9853637a7c38720586af4/zoxufanowasivomuxofid.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351387d7167---36510168883.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/vevuvejonunewitobatidapag.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a519da4b9e---pisefukatija.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/liwema.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/55803889423.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/28955345094.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/94568551821.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+scan+qr+code+from+iphone+screenPDF 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_off0000d904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 11060 bytes
SHA-256: 97f8fcf554bf617ee72243a3d9620c93ca9c7049d85fcf1416f64920ac10a33e
font_01_sfnt_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7B 18332 bytes
SHA-256: 931f8930b65e1ae438bce9c69a2661723296a1c5271aa0208ff461bf3416f3f5

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