Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7ac37f32657789…

MALICIOUS

PDF

78.0 KB Created: 2021-06-11 20:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 20d6e0c0a9491cb7b315150bdd18ca8d SHA-1: 755d286afe68889358e20c5e2d784213e48e2f12 SHA-256: 0e7ac37f32657789537252d15e33f789e57299005f4dcd626c8fa05f54453964
204 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, many pointing to compromised WordPress sites, likely serving as lures or download locations. The presence of a 'download button' lure and explicit instructions for handling a password-protected archive strongly suggest the document is designed to trick the user into downloading and decrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=pdf+combine+pro PDF link annotation
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/prjfemng4rkb893p4jvjkkvic4/42164946347.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea6ea2120c---bofedisasosijekevifumed.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/xuzel.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/dutatuxorego.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/ziporovekadelo.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/20c29c0d5cc0ed3fa0f2e9e82d843e55/76904630663.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/ff69390148826e090a2f634ab97f00dd/sotibumenodevogov.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/49964855476.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078b6bda8b00---93299016726.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/abf4a73be9efdd982a41f90ffd5ff776/zogozijato.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4d7edac4a---mosufigux.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/wijumuzulusuganozana.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/6fdah252m7mbka0dgahj5njd6q/gatorodidataxoro.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/0242dte0emug99j3of665g50u1/nuvujumosobojozisut.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2464d6720e4cb3e780a89058ec1a38c/30018210140.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/53th9vgpjp6geab36nkukftrvh/27695768844.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/57526588830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AD 5020 bytes
SHA-256: 45d89a6a8c63b66c0376b8860022642d99a01b0b870b22b7e71a2eb926cab40e
font_01_sfnt_off000105ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 11188 bytes
SHA-256: 109198ce7ba3eca82da0cc3cacd2a1857e21c81e47f2db0117ed4a702bba1920

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