Malicious PDF — malware analysis report

Static analysis result for SHA-256 468ac125259c27a9…

MALICIOUS

PDF

88.7 KB Created: 2021-06-14 08:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9acf00d6cf44efa43c6f1d8771e823ec SHA-1: 4079928b5ccfa31ea3861142fd9c87f6a782754c SHA-256: 468ac125259c27a930b0d9a2e428799cb6d1bfa41b46c058f3b70458e4319fda
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://nomylo.ru/uplcv?utm_term=letter+of+support+for+job PDF link annotation
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/ditalem.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/15d8242b8af6c97a0a4b772175a87936/zugeladugezo.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/wenarop.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bee036a3065---17761542808.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/72812da3bfa10a952dbfbb674d588275/31949784308.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/c53d5d8f31120c665a748afbe3615570/jixoxegubodifutobul.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4330e5eda0---89223773497.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/nosefetakegobijogoputobu.pdfIn PDF document text
    • https://vestol.bg/files/file/zawezinaxulerejo.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/dabeweneza.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/dbc151b604661eba7be1a570446db5b8/47973950220.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/74493860139.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/silirajodubo.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca12d66972---rovedinelu.pdfIn PDF document text
    • https://atl-50.com/files/file/24884442025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F58 4812 bytes
SHA-256: 517a8efd53fa846c0fa1a910dfbc4c14bfb4678b1df5eff0d73167ca86fbfd36
font_01_sfnt_off00012fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCB 11356 bytes
SHA-256: 8b615469d61ffd0a9e9dec9a5c6ef5ec0acb6e833b886e9598b7b125193ffc20

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