Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd1dcad94778e3e…

MALICIOUS

PDF

83.1 KB Created: 2021-08-20 22:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5cb2f3078af5828cea3c014587890bc9 SHA-1: 06f1f76acc6c63d62b39121cd099e6625b5b8543 SHA-256: abd1dcad94778e3efde0260e0acb0c96be80a7d15416b6fab12acb6648de1eaa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing malicious software by masquerading as a necessary browser update or extension. Numerous URLs were extracted, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted from this sample, but the overall pattern suggests it serves as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://domki-kopalino.pl/pliki/titogumuleluvowajisexo.pdf In PDF document text
    • https://champion-osk.pl/userfiles/file/tubupedarevujatibukuvi.pdfIn PDF document text
    • http://zuche0551.com/upload/file/jewig.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96c81f2c1---32115857420.pdfIn PDF document text
    • http://casaalu.com/luutru/files/worujarojevifijobofefi.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/2d32f235dhraj1phrt4j4d8g78/jofebunawisixemovar.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/tipalulur.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4f0d7cca---57972631626.pdfIn PDF document text
    • http://teifsepahan.com/files/file/bozusawituvurojexawes.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a44943657ab---10402607347.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/96114287987.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/namuvevijib.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/32270245515.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909b5532374---35176626354.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ddaq75kr9sd3io5vfv2dtv7eas/gefonesoxemenaxov.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/xakalelegumifeneb.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3f8d55040d7a602a6d773bf2caa30edc/naburifikekasefedatak.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/tuxem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a2885474---86101514644.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/buwexaxoforuzagezi.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608170c8ef6e4---pojoliwumirar.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/3a91d6e14d85e6519d267a76047b8a3d/41860599951.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828001c181e---parokuvugew.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861e6d04847---57213289389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=toxicwap+free+series+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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 16616 bytes
SHA-256: 93e53a380ba9fd60312c7f5b1c9eb74bc1b30bccfb6b8cb7c6110f66b7404a7b
font_01_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12646 10664 bytes
SHA-256: 99909200b34f671f43c6d8820bf613e3e22299c2c57d165ade8a876182550766

Open this report in the interactive analyzer, or submit your own file for analysis.