Malicious PDF — malware analysis report

Static analysis result for SHA-256 6446f26c224dc70c…

MALICIOUS

PDF

90.4 KB Created: 2021-09-03 13:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0f0d660cdb6519695284d1867327ceb2 SHA-1: 9e102383a010164784f5589caaeb512eee1286cc SHA-256: 6446f26c224dc70cf2bb2e51382511c87c4f27e90bed45f61eb1b2908f2c7cf2
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself does not contain executable scripts, but the embedded URLs are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/a9b9aae924298aa20fd86bc7ee29057c/judigajogu.pdf In PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/werilomumutugitud.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1612c7aa24a23d---70302498881.pdfIn PDF document text
    • http://waltonjohnsonfamily.com/clients/870437/File/34351439865.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16275705393855.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/31765604751.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8acaf8fc5c---48372259511.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d543a39e7188ff2b25fcd93664444522/42702936105.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946e0d7aa2e---sobesuj.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///wibusiwugilabi.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/11oebk4c4bpnuguhbkoq3mua43/20565451781.pdfIn PDF document text
    • https://medtek.vn/storage/file/76560959206.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210715235348.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/vipitunasutun.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/limopo.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/zuxivagutenusebur.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/35212988922.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/5ee4126e4f635488b693db5b7c703ccc/jawizogik.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a56020cca66---68070423969.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/nn3hcqhao1mtbd5c0phn61ugti/40051982019.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210604204312_4kpdkr.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7a129aad218321a688e949e810f415f9/losoderulinaramonedu.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/jetotigiwizasesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=les+pathologies+de+la+d%C3%A9mocratie+pdfPDF link annotation
    • 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_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 11072 bytes
SHA-256: d5b2a14f5ee918a4298519e7e1fe402d430d47ba72d092083f6120f2a92fc329
font_01_sfnt_off00010dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBE 20804 bytes
SHA-256: 238d18c018286b0aedced815a86e7624ff2e55629bd8933e53752d70651cc509
font_02_sfnt_off000141cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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