Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92cd9273855ed56…

MALICIOUS

PDF

83.3 KB Created: 2021-09-21 00:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aeb7e03dabc2c941f1c03dc217f4f4f9 SHA-1: 7b6e5dfaa5ac386cdba652c44322206678e6fdbe SHA-256: c92cd9273855ed566725c7bab910f14578dc0508a770c77fdf48b3da842bb311
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier with high confidence. Heuristics indicate it functions as a link farm, with numerous external URIs pointing to disposable hosting. The PDF contains embedded URLs, suggesting it is intended to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=your+lie+in+april+live+action+streaming PDF link annotation
    • http://hagelkonzept.de/userfiles/file/fojubexusomudas.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/waviwedejabexewedurijimud.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/69540622020.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/bokarezuwudekodetatibe.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/55363331203.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gofagedazarosakegikewulo.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419c835e5f4---73240604013.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/zitetovusoxububipugod.pdfIn PDF document text
    • https://inprovitchile.com/ckfinder/userfiles/files/92281846548.pdfIn PDF document text
    • http://riversedgefm.com/files/file/66666721970.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/borixulonofa.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1631383924.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/41587154895.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/xetonomegeto.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/punokum.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb85a6e81---1368503225.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/dasepevewipoz.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/kadenugixebodidaxorat.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/20698032756.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210915145524473678ev2tap.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/nejafumuwal.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/8562966930.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/ruboriwatasevuzojox.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/35630833851.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/kiguvinapipuxeda.pdfIn PDF document text
    • 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_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 10868 bytes
SHA-256: ccbb36c33b8df65d5617b218b4e15462f6a1f8bfce52c0457b976b17476d6a16
font_02_sfnt_off00011210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11210 17476 bytes
SHA-256: 23c7e41b9ca6ac8ccfb2de58e23235687f9bd96bbfbf779f0fda1e93e2901301