Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6aec62948bee0c…

MALICIOUS

PDF

103.1 KB Created: 2021-08-10 19:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: db2dc96a0c868eb4feb90693e5a2ea51 SHA-1: cd11b3f4d5d0a5213ea72354ca1ced589cbf4b69 SHA-256: bd6aec62948bee0c90cd42d043b1d66ad6a842be04fabd8cd02ea9642c793651
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 http://dailyxedayhang.com/userfiles/files/1300469510.pdf In PDF document text
    • http://carszana.com/image/upload/File/bexenolaxax.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/lonimokef.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607926079b405---19693339313.pdfIn PDF document text
    • https://polytex.de/sites/default/files/11813411803.pdfIn PDF document text
    • http://cortabellanews.com/userimages/fekadiduj.pdfIn PDF document text
    • http://calzaturificiocatia.it/userfiles/files/popagirugexukarilekige.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/gipanuwivegotujasibixa.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a791f58b697---73046947169.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/60510852325.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/241d2g18fo8sqk8cjkg0cpu433/11992311171.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ebd87bb02---53857918718.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/81242a1cd3e5538087a30279c1af788f/76208504331.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076e882418e8---78202949416.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/xebuxowupofivot.pdfIn PDF document text
    • https://digireg.se/upload/defid.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/datefufasakawetudev.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4735b7f3eb9cd2cd4d162aca7f1c0c20/89601223295.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/dutiweme.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/22dbcng12mipn7829c3t12ac07/27687313522.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbdb3c5956---47353741239.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8946112e00---xisemavebatijovasikifabox.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c512f4449df---89017146603.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/90313281074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=beauty+and+the+beast+2017+full+movie+download+in+tamilPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 1784 bytes
SHA-256: e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb
font_01_sfnt_off00011293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 18712 bytes
SHA-256: 289e8d7d886c70ab37ff1ee472c47db3b5e6ca03b0e169adb2e58c80167c29b8
font_02_sfnt_off000143c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C9 16280 bytes
SHA-256: d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515
font_03_sfnt_off000159eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159EB 11424 bytes
SHA-256: 86393cd9684b28f4f4d302ee0cf26d0e8d76a4126fcdf65c75b04f3d0e0e7873
font_04_sfnt_off000174de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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