Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4538d96726a1d2…

MALICIOUS

PDF

571.9 KB Created: 2021-06-10 04:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f47be0fdc9f239ec4ab0538085bc90ab SHA-1: 97180b9b44de5d1e7545eda1c2b57985525a68ab SHA-256: 2a4538d96726a1d2eb48aa949d6e203ffe6e7eb55ed5d8d2a42053047767f498
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8844

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.
  • 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 https://philabc.ru/uplcv?utm_term=corporals+course+leadership+1+answers PDF link annotation
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/7cd81ac9df68b6ec17a57b422dea019e/xofotepupaxofub.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/1deu3gi2itba1vrrjfn56phcr3/2370550266.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/pumawojogovu.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e292d4dc---60054134372.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607756018f7bb---81689989853.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/vesenikilumemu.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ki5ug3d6nal0utqel7gj751egr/kerozo.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/lobilagujosonaluzup.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160afc7bba434e---sesitadosali.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d41962e705c2e3a5fd1f51de62daf381/76893599966.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608237d3bd9c8---bedukofalulineruwi.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005d7d498d---dodagofavimokitipabomuwi.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b952ccc154---95064678429.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/6ffe20ec552a13917305088111118c74/tememupenotop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0008952e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8952E 5132 bytes
SHA-256: 6b362ef5bde23c76adb8eca95f96e71d1742a25a2dde04ae0bb31346b2fcee5a
font_01_sfnt_off0008a6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6A2 13176 bytes
SHA-256: d261b70c8e283c529c6829bebc6195227622ce051651b69ad076b8b6ad11d6d3
font_02_sfnt_off0008cee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEE5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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