Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb24fc127c51a17…

MALICIOUS

PDF

83.0 KB Created: 2021-09-18 02:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7e9742d9b08baf90acdbbecd6ccad599 SHA-1: a489b0a8984ca986aadf16253956fad217d2680f SHA-256: 5cb24fc127c51a17e2c7536b445b1cea70b006e529272465a11c5af5bb0e1c42
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites. The 'utm_term' parameter in one URL suggests a lure, and the ClamAV detection as 'Pdf.Phishing.Trojan' indicates a malicious intent. The sample's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=purble+place+unblocked PDF link annotation
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613586a9a8f88---6458636262.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/161434d453d1d0---gidileluranugoziduvif.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/madonivo.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/zetezumawularaperakelaweg.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/45556882953.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/xumidana.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136b31b6466b---figilimuku.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448e0fe304e---dafapabegitirolapirole.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/katakijagazunuzirosow.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/99761420514.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/dc8be79bafceda19f814c347818e9bc5/75381442205.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/vapemilejuvagosin.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144072a667ad---tezesapumopivikafi.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/e80bbc8be1ab15b5720a89a24aff0b0f/jasunilagitetivor.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/97190221535.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/69318167686.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/logorewukupilef.pdfIn PDF document text
    • https://citytrafik.nu/images/file/tumejamojuzidebilu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612efcc0125bd---15376238471.pdfIn PDF document text
    • http://placidlakes.com/larpm/uploads/file/14052181706.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/48356884760.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/libohmncsf01fetqa0dq9qq1ak/37874198112.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/60971203690.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/2403493682.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_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 10480 bytes
SHA-256: 82c77532f64ab9402a04d11e0670fa1797ccccce9bc9a5ac1b5d553889a7a7ea
font_01_sfnt_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11112 17308 bytes
SHA-256: f2c67fd2bc65c5c0348cf71540bc8bd4d65ad7901a966a5975c3c820e8741243

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