Malicious PDF — malware analysis report

Static analysis result for SHA-256 7679ece127f3a222…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 20:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ef9d0b72e0408621a9b10aa0a9ae778f SHA-1: 1ab2bd145a0a1a9fc41f92770437c398d30956d0 SHA-256: 7679ece127f3a2220f2543619b0c5e3e946ae1c32f92ee7254b9c030c5c6e803
196 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm for phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=decouper+un+fichier+pdf+en+plusieurs+pages PDF link annotation
    • http://buergerforum-tirol.at/file/vesegerabipejiv.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c93e4ce16e---1431481760.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/80df12464fc3d464766548b295be4991/jilujejimedojaxuv.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e97a97dc4a5---52463853097.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/jugodabavoz.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/80020958685.pdfIn PDF document text
    • http://elesud.it/img_pagine/file/fegojakagowalenixunoguri.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/44873141301.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/bubelexexepo.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/nemiv.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/ivghc5297omfvqi1ftbleeais6/gosefev.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/nexozulanalesev.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/xigakerijolisatavoxud.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/88392277439.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/kegofaxediti.pdfIn PDF document text
    • http://transinfosoft.com/userfiles/file/pegawini.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/kawaruxisewivoja.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a922662e9c2---98070942750.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/gd431b58rfpg9ffcmp6bpriuq0/72994502237.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/76742399097.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0678bec87a---zirusona.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccaefc7175---10672410914.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/76903979768.pdfIn PDF document text
    • http://recrute.fr/files/files/nurijizuriseperigisiwiw.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_off0000d98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 10904 bytes
SHA-256: 66721c67cbf2229c67c3b0ab2a241586d81ccec9149d9af398a1ada1e88bbbcc
font_01_sfnt_off0000f270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF270 19488 bytes
SHA-256: a923386bc8dff0924c2b8c01c986f96e93466447179720cd160de44cb6b21c58
font_02_sfnt_off00012333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12333 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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