Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe6c43640eb00d7…

MALICIOUS

PDF

79.6 KB Created: 2021-09-12 09:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 18c3b40b31e3010ecf839958f85e9610 SHA-1: 1cfc265543dde5aaac0e5d61230abd4181f3a600 SHA-256: 2fe6c43640eb00d776bfabd3f57ca8d7947bbc7dd55b119cef88699d3f6aed38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://wastran.ru/uplcv?utm_term=league+of+legends+wild+rift+hack PDF link annotation
    • http://huyminhplastic.com/upload/files/91706141184.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d78f34ffa3---donadepesesebizubinek.pdfIn PDF document text
    • http://ruihuitax.com/files/file/jezux.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/82494461410.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161372984f1ad2---35751572236.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/lepizeninufejisado.pdfIn PDF document text
    • http://skolky.info/foto/images/file/85890051443.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///weteselaxe.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/28009668278.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631029027.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/kafibodijekasawofavorekek.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/6829714472.pdfIn PDF document text
    • https://uroci-kursove.com/userfiles/file/kodaxa.pdfIn PDF document text
    • https://bselink.com/userfiles/file/tevelimolixameberesi.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613d45bb5d9f8---95683707806.pdfIn PDF document text
    • https://digireg.org/upload/zukekelujelexepipukakevi.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/metusigalop.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/60563372526.pdfIn 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://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_off0000ccfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFE 10992 bytes
SHA-256: 72c02d09a073f0afcd4af8a7465e1cf8efa71882277509766f6322fc4195d90d
font_01_sfnt_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 19920 bytes
SHA-256: 969d52deafb34810ec395a859a3aa317ec967cc330f858591861002c70b6629f
font_02_sfnt_off000118c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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