Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f0c9ffc81433bf…

MALICIOUS

PDF

137.8 KB Created: 2021-06-27 12:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 165a8d02e9fa80783a529b80d514c040 SHA-1: 7f9e57172e7b1df739cf4e6eb340a0b1330d8b69 SHA-256: 74f0c9ffc81433bf4ca0e5234889d4b8dc289ca354d2f818792af76b334e11c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The presence of a PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the ClamAV detection as Pdf.Phishing.Trojan indicate a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://huntic.ru/uplcv?utm_term=twilight+breaking+dawn+part+1+download+mp4 PDF link annotation
    • http://kingalbertltd.com/uploadedfiles/file/57759598875.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/fifimezorop.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/73220521062.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/78c4b10ceab07d1a45bd2a37ccad2eb0/78535191043.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/sexedijere.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/rililovesuti.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9a5205d4f---54698901729.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/4c144e0fa2eb42eaae7fb9833727f78f/80826729267.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/42176829188.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/e5df7441c763ca66ed6d0bfc0c7d1d69/95251762524.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/63593817096.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/989f24391ea8dd3c7baee23eea917350/56543098060.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/48265187415.pdfIn PDF document text
    • http://demkapi.com/resimler/files/lubobevo.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/vabadobanikikonetiwuz.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/todos.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ff1e07cc62262c26b2113e1b421750fa/mujive.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/00uu23eep95qc9uvnun5o8ls2k/kuwesobagex.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/11604308991.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/32504022572.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/eeoq11ksnpvogtjg5r7qns0pl1/wevimejid.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160adaed5f0b83---rejorutemag.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/a3c0510f60c54a3a8aecc8b5496b4b23/lerasofupamenidoguxaluko.pdfIn PDF document text
    • http://upbfassadenbau.com/upload/file/72400635772.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/likifatidigobama.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_off0001b549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B549 18828 bytes
SHA-256: 95a69b5c2b8c39817ede0446ce4a104d56541371bf1ea47301dccea37f0a9243
font_01_sfnt_off0001e62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E62F 11080 bytes
SHA-256: ba9c926a17bb65196a2b25ad3e24e74c8b10f1244207bc29b05722649b1fd827
font_02_sfnt_off0001ff79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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