Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c01c43e808848e…

MALICIOUS

PDF

85.7 KB Created: 2021-06-30 06:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 75ea1d50dddddc9aa2956dd6e15e73ce SHA-1: 6cd8bec543e2fc52b6588d1265aa5b943c0c49bf SHA-256: 54c01c43e808848eddcccef915456c853b0c7ba5341393de06b7035c5c980852
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://oniceh.ru/uplcv?utm_term=chariots+of+the+gods+book+pdf+download PDF link annotation
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/5k2r9dir9h10u768b9aj2ng9e9/12134456331.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070feb33de85---85259525071.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0239b06ef---kedufozuz.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/medusujurifo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ce32d2f20.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/66009631696.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/bikimexajukukasis.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/d4b006cbd798d623d4ca1b813bd66e67/zefevisivizuza.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105201900484457.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/51445378465.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af785283624---44972265383.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/84029352951.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/c77d7bef2bb3aa622b0fb696948dc97b/13902477199.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/pa9ttjk31a9os7fogeelb0irp1/93102734958.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/a04ejbtsc5l894j2vjl1v0ob55/jajaxulugokunoxazumumu.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b2fa295af---84426824806.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/75b48182b6485c3bd3d0b72c90d2e9d1/38608797342.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/22647359927.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/niwafigaminojoxukuvomo.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/ginoguzoruwenulopo.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/fexoseruxosifi.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_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 17752 bytes
SHA-256: cb60d18bf4c337b1b47007fcf68a362eb280a5e0bd8101dd191db58577eda49b
font_01_sfnt_off00011660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11660 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E77 11128 bytes
SHA-256: 0af548087c1168c3ef89fc233cfb0842199357b537d629916052eb0dc22e9687

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