Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4014cef731410d6…

MALICIOUS

PDF

77.6 KB Created: 2021-08-19 07:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 454684e9b377aff41de10d172bad57c1 SHA-1: 6b34bfe6310f13596284874bd18fefa077bc51d7 SHA-256: b4014cef731410d6b98f339d4a7fff3efc1236453516bffaf41a10ce78761e5e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8596

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755ac6cec51---fovokesedogixokobax.pdf In PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa2085134e---66119776245.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160f723c7ef9dc---zaruk.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859aeb2f45b---17086133095.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/oducrmgnqq0jrvir616monfl28/24830162833.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/26095798312.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/64571307652.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efea17b03c4---42035381247.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/pudg6a63b8svp9lbmfd5e7r8d3/47863421324.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/tugim.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/55966241209.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/31c11ceaecb4ad07f14bb6aa722bb697/pofowifune.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/17652374639.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/16999081201.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54353871105.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/c914bfdd46723c018f31a9873d0fb25e/mukobokenajomidulas.pdfIn PDF document text
    • http://erpos.sk/data/files/pagolusidekigixiveligamef.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/srmu2fdmt101lamkdpeajlmv3j/xedom.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/13701963058.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/730g60cgm56lp9i5glpcs8faqv/21625149020.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/24872543806.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/f9075f7ef50e7d424daf70ea0cf4377e/10588313998.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/90fe252135afc5115d66ff3ce17abbed/4185286605.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/161054145ee3f3---95948154254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=does+ustraa+beard+growth+oil+really+worksPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 16692 bytes
SHA-256: 2ff14749ac8c33726f3cd5a30fe690e877fd85167b745463c9fd24ba29c7cfde
font_01_sfnt_off000110d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1