Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc2df452c295b83…

MALICIOUS

PDF

78.2 KB Created: 2021-09-13 05:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5184b8cb46fc2505179af6277e1c54bf SHA-1: a8d25049a60d8c98e482807ded01d8adb4864448 SHA-256: ebc2df452c295b83900b739a094f4380846bf1cdfbeeabaa5bc75a48ce51e4d2
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings strongly suggests an intent to distribute malicious content or conduct phishing operations through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://sinners-party.de/media/file/rodevebedare.pdf In PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332994e93dd---24771564851.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/41439976706.pdfIn PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/23135857889.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16137949648a3c---56246921572.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/satodawovoreti.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/wasimikonaronan.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8e4d954a5---pivikaxibat.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/boxozatewenujeno.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/54092767579.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/90782374193.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6d6b60c5aeca4aaf27be733614e09463/99767763327.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/38045797691.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/mezegotududuvikunamavi.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/13767684390.pdfIn PDF document text
    • http://velisend.ru/photos/file/59855457564.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/wawesopujitorumafizuf.pdfIn PDF document text
    • http://technocom.pl/editor/file/ximidiw.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/wubize.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/webetikepogit.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ad978282a---88200752259.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/gazerut.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/dijobavupe.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/20977450571.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314256412b7---kogujerawomevite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=pc+android+operating+system+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_off0000cd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD61 11056 bytes
SHA-256: 0f1027358a33bb5df7a89236e68a58d6d9a19704ce30eec4175b796740388e22
font_01_sfnt_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 17224 bytes
SHA-256: c0154d3b62a2619343dfa87889f16f61095aee408d22ef631afa42a168405331
font_02_sfnt_off000112de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1