Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e4aad7b075013f…

MALICIOUS

PDF

96.4 KB Created: 2021-07-23 03:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cbd148e8f39f18d79e69f129b3ece27f SHA-1: 9c8d90446760c3add3ffe7532caf57684fe12e89 SHA-256: 17e4aad7b075013fd84ba165caa7d45f34e1916c07a0701e9e8acb0742210c5c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL findings point towards a phishing lure disguised as a passport application form.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160708b0214a38---sodarituniki.pdf In PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/fekozepupi.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a7f79f82b---97801962180.pdfIn PDF document text
    • https://agermag.ro/mm/file/xadimugulabex.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/a4de846d7e68310178b6a07a1067c91e/88318227462.pdfIn PDF document text
    • http://puppiesulove.com/clients/7/7f/7fa6d7836ea929643a3c23f4562b158d/File/buzivukawuzivogifupukiga.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe877d113a---welow.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16089f9de2e578---80032768813.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9c0b46bae---67891119393.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/rufezedeloregup.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/64a669c5fa14c305cf1da1c9ac6f6660/51495444797.pdfIn PDF document text
    • http://kisito.com/userfiles/file/75376915537.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/fobaxazubutekoxugusawo.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/53700538243.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/82500315855.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/ab2211e2e8e7671aa91fadacd70d08df/55935286180.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0db47e7f4---gidukufa.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4358c001f1---zavunimixuvilazoda.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/pamonibeta.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/moxawemepibikawugirin.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/65288911711.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c2c5519937682d10f64db664220e9c08/92876976010.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160834a2ef1b3b---62702704708.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d177018cdf---88369644261.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/xulusaxitibazuru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pdf+fillable+passport+application+formPDF 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_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3A 10924 bytes
SHA-256: 79d9515f300edc16cafdf263d850669942a9aa1397827b76cc2e84478cdb7dd7
font_02_sfnt_off00014642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14642 17532 bytes
SHA-256: df8b02845b9e23a3bc60160408965b4bb673d1d493ea492e98cd06997f929671