Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01c2c9cb2fc25c8…

MALICIOUS

PDF

90.0 KB Created: 2021-07-24 02:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b5732c56bd55ac66eb13da929ccb0833 SHA-1: b0f08975c2687f26c9403811d6a30c60dffe4fca SHA-256: e01c2c9cb2fc25c84bc3aa858398c33189056c23ab33df34d67f624148097955
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and disposable hosting. These links likely serve as lures for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/928ca10d6558643f58ba26643b3d73bf/gobilowudenelenipuvote.pdf In PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf10816617---44789214481.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/f69ed290dffcac9f05f2618fc631b2d7/68512949726.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/tinubadisoxi.pdfIn PDF document text
    • https://x-software.cz/data/file/66091090807.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160db605522649---63653522807.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c31973b196c---37846667618.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/51147241865.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbde3a5c70c---50478570352.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/nijopumilifala.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cf22fe07ca0---71558491395.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/babas.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793c6498b1a---fifuwilosumobudexiliruk.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/5140469248d14ae95dc4fb43cd05d2fd/witikes.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/16681864193.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/kevegazarabidudogumorixuz.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/20158424604.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/majisuzinemibomaleruza.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607847e80bc50---93738316117.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/97621407096.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/54196626739.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/bisan.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c095ffd06dc---vuvawu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070976776b70---giwelovekazuzamibef.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/80550068435.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=dork+diaries+tales+from+a+not+so+happy+birthday+lexilePDF 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_off0000f96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 11212 bytes
SHA-256: d2628c5a2e4b8cfaf7771e36cfcd92a58df400304131a59ae4003a61a98610d3
font_01_sfnt_off00011334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11334 17888 bytes
SHA-256: 046b1827c75e0f035253ef54a217c49c3a8dc84982843b2560d61ed6919f70e4
font_02_sfnt_off000141e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1