Malicious PDF — malware analysis report

Static analysis result for SHA-256 e082d00e9530dc4d…

MALICIOUS

PDF

81.0 KB Created: 2021-09-02 02:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48d39e641ee9a583cd01c5b79561f72c SHA-1: 72780e3d7d5540498dfde4a242d1d2aa550f4f10 SHA-256: e082d00e9530dc4da5dc11208ab3f1fa1841a0dfa3243d18a152d280e0faf14d
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URIs indicate an attempt to exploit vulnerabilities or trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://huntic.ru/uplcv?utm_term=harry+potter+and+the+half+blood+prince+images PDF link annotation
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fc7200919a---sojuzijuxita.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/09ufrorkmbb6n1bf8praphdkje/57462406791.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/92407278762.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/zirekejimetamewefisi.pdfIn PDF document text
    • http://farashimirooz.com/files/sisirinarafewitagolotilet.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/winezefurisikerexukikugir.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/lafop.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075527dc27f3---goragibunalexamijibug.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210524214256156.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/sijiwejajijejubigoza.pdfIn PDF document text
    • https://webmenuplus.com/images/file/71231105282.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/xemowowidudirole.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/fb4e82f1dd3de68fb64cac4958c18d03/keniwuvadufolibulazur.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088294858b17---lorodazutofoluviwe.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2357bb638ad425b90a508db57b5697c1/34639160926.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/riretavekajajewokawov.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021062623173973499.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/kepudituluxijelitu.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/gobumoxerazapiliwixado.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/76076501064.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160aefa0651419---39946982081.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/80674816218.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/farelixuxolokimosobaris.pdfIn PDF document text
    • https://bio86.net/fichiers/35560797648.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_off0000d76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 17660 bytes
SHA-256: a1da82e6e4e3d1562ab113239c138fcb75867bd124407957a96fd7a0d0dc58b1
font_02_sfnt_off00011c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9E 11312 bytes
SHA-256: 77eea4d59aa249e90be0edbcba553e24e12796261ea171f8ef62c5bd0116c161

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