Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5d4679d09e818e…

MALICIOUS

PDF

84.8 KB Created: 2021-07-28 03:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: ddd15aff908f546a6f0cebcd7d4f2345 SHA-1: e74274b237072febd0246312f69f15f7fb473730 SHA-256: 2d5d4679d09e818eff8d1e26e8a8585ca4200c8412d41b3e93f47d45ab744124
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/75444598ba5e73e0cc891b1554989e9f/59395558744.pdf In PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b43f29c076e---99345889764.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdd6b503e8b---40234722765.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/bb3fb15eefe2c544d61885a465532d0b/fovuzatanifilew.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/95073014834.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/korolazejaxe.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/pp3vvmfl2j7e4s2d1lujq3ftm6/tejasaxax.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/bujurase.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a096ad2e92b---wirepuzopupiv.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/nokevew.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607723460face---51895523962.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e22556d659---sugepa.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fe479626fdd---xopajilimarusiboga.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/54688948445.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/tikisezozun.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/fa17e2e63e0c09ca6deefb46efa377c4/1082592363.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/7lgjamjg9kgikkoee2p6n80a26/bajebigotare.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/4531817973.pdfIn PDF document text
    • https://sanidom.pl/img/file/87146122149.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/15034736754.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210602_EE1484FD82933334.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607370c7ac213---71436163137.pdfIn PDF document text
    • http://www.puhito.hu/uploads/40397928442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+write+a+cover+letter+for+a+nursing+graduate+positionPDF 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_off0000e8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 16300 bytes
SHA-256: f4b1e5bf217d98d795bed029edb262f9b860637f8dba36ea8efd1df906f7b30a
font_01_sfnt_off000112ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CA 11040 bytes
SHA-256: b8e69d63350e2649c1f42917ed1f99e85e33e4d3d8717e968ef3559009cf6ab0
font_02_sfnt_off00012c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1