Malicious PDF — malware analysis report

Static analysis result for SHA-256 14da40e1a1f02722…

MALICIOUS

PDF

88.9 KB Created: 2021-07-13 20:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4114da693c70cc987dc90cdc63e4cbee SHA-1: 47ddeb21e67fcc3b85ac1b75ab2dd9b8a629369c SHA-256: 14da40e1a1f02722a170daed4fd49031e542cf310c505420c080276c724a24e1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into phishing scams or malware downloads. The presence of multiple distinct hosts and the use of UTM parameters suggest an effort to obscure the ultimate destination and potentially track user engagement.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=1+to+20+elements+name+and+atomic+mass PDF link annotation
    • http://retrievers.su/ckfinder/userfiles/files/mutorejozoridivagevijude.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608bff0a3097a---98505351690.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/50d2ffa7e3a3ab7ebdb801ce37a4dc31/detutipir.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/84738742453.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/rgrteaqemp95u34ucij4dnupn8/51994690380.pdfIn PDF document text
    • https://tecnicamistasnc.it/file/lapajimoba.pdfIn PDF document text
    • http://jarosi.hu/files/file/tilefunatewuxiv.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f1992d675---vulaledebixeladazatos.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/54247103095.pdfIn PDF document text
    • https://actor-conseil.com/files/file/volofolumavawipavef.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/4cd19064de8f6b47d22b2863e77d6a52/wipofivimumeka.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16079ddec4742a---gejar.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/gaxusu.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/20216201144587272.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080918d827ba---24716427318.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210701_005052.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/leziganonasipi.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/pirozudokux.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/76520105085.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7094535be9---devalogagupowe.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/2gl17avc747ovgov120vvesbbg/sologixirel.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/nt2f2j90os69gfmtgfig1uffej/xoritasekoxozawaroji.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_off0000f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 10628 bytes
SHA-256: d9aa3e5878e334d5290790e6a48618d68ceafaa2d76bb70d271c87779d1387cd
font_01_sfnt_off00010f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001277c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277C 18408 bytes
SHA-256: cad8e3f365abb63e8d8fabf16f82101b5539b261bd3ceaaec16c45c2457b3b79

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