Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3ce8645c6adadd…

MALICIOUS

PDF

77.1 KB Created: 2021-09-07 02:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9d51e0fac6fc6022a52bdd303db1322d SHA-1: 1db73b1a4dd9317339d736406cd343fd192b6d4e SHA-256: 2e3ce8645c6adadd93b046b3196e231f0447808791d474d229d73a74b687772e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple potentially compromised websites, suggesting an attempt to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm suggest a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5905699438---57959383513.pdf In PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/jurilatuxebisepin.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160af681c4a0a5---29346360279.pdfIn PDF document text
    • https://saporidelletnastore.it/file/98484154265.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/48135353452.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/00aa381921469eb0291797566fc8c9b1/28153690384.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/89864017192.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/1889542935.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/8e7ded55881361c840334e38eb9b52fd/7259536117.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/2139db633e296a4e0b215830abb8515b/fopevusanaveposonifo.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/22763394237.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ee343b04b---52387658436.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da9c1c5483b---88722980397.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/115ocullu3s01ntelmt9f56hse/zutagedemawudaludiso.pdfIn PDF document text
    • https://music-group-store.com/upload/files/vebodivodi.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6f67bb240---wibuvukopulirini.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/21056296636.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/vatosomijibove.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/11d6737b74c15baf8a7755254e7e128f/vagosir.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/lutawure.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/41385139838.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ea890762c---komasemezubanaxivixomes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=collections+in+java+pdf+ebook+downloadPDF 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_off0000c93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93D 16624 bytes
SHA-256: e577b3e0314c7a4812de2b2a7c114ac2c03ada2a502678b4fd829e8435609ea2
font_01_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 11060 bytes
SHA-256: 204699e51d482ddd67feecc09756b3ac2c77327fc3e8a168d61c9f4f91c3931a
font_02_sfnt_off00010e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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