Malicious PDF — malware analysis report

Static analysis result for SHA-256 79206dfee347a373…

MALICIOUS

PDF

82.9 KB Created: 2021-09-18 02:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 56b48c5956e567e9d3b90a92550ca16b SHA-1: d557d7ed71df9b96d93f9936c124e2f7beef133a SHA-256: 79206dfee347a373791dcad8e07ceb7857f4c2ed0eea736e86b594d24ba3a2cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://pixomot.ru/uplcv?utm_term=film+italiano+streaming+online+gratis PDF link annotation
    • http://tw-sincere.com/upfiles/editor/files/22116422489.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/fetemozus.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451b93d2ca6---dumikil.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210902_080414.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/34178087060.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/tedagipetugevogog.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad53e94669---13271858662.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/78504354516.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/vovoxolaki.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/61018676879.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/pojazimatezukaxageri.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/39895568510.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6b9602120---2568031187.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/77010957503.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/sakimudukuv.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/purugezaji.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/porexemik.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16141629c80b50---59166690421.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/zozubewixazalilif.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/17539941730.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/masuluw.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/18485499577.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/vemurebimilepidalofobelit.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/89880298792.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/bumevubuwejuni.pdfIn PDF document text
    • http://teraval.cz/res/file/23791737563.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/notuxi.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_off0000e130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE130 17436 bytes
SHA-256: 836d53d9795b68351fdf40af1f19214b430908d0af60c46807b839fcc3bbf362
font_01_sfnt_off00010ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDD 10428 bytes
SHA-256: 286e3e2f1667e16faad20bfa6485085863c8be5c4e90be22071041847903854f
font_02_sfnt_off00012573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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