Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c046a1ef0bf8d7…

MALICIOUS

PDF

81.6 KB Created: 2021-09-18 13:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2657cbb35d0197ffc8427a4a043c267f SHA-1: 6464aeb84c5a2a90b5e4f397038b79c1f1bed42c SHA-256: 07c046a1ef0bf8d7867f400319540d1332e1224fe4f7c5121c24cc5b58629178
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://crewmak.ru/uplcv?utm_term=all+dogs+go+to+heaven+christmas PDF link annotation
    • http://fourfoods.com/images/files/zewonu.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/94614570457.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/bosivonalilomitilukap.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/dinogepu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/1fafc12430735519327efe541a6e0360/reroki.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/92673094196.pdfIn PDF document text
    • http://innotack.com/userfiles/files/98319156654.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/widizifol.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/vt2bs0cci1i9a5hq0644tvuqbb/duduvubuzivol.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613c721a04a7b---35305734174.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161410d4bee159---48338184454.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/59448452325.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/20433338968.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109091949243653.pdfIn PDF document text
    • https://zzwgjx.com/d/files/dipirupasosilagukeluluto.pdfIn PDF document text
    • http://stylekd.ru/files/zewerupomibudaguwulusi.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/xonaluwa.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/48871843379.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/jazujipesi.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/29901697854.pdfIn PDF document text
    • https://parc-hotel.info/file/50690159055.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/dugajapafasivolizomino.pdfIn PDF document text
    • http://vinhthuanvietnam.com/upload/files/71924895858.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/kizijoso.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_off0000d7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CC 10864 bytes
SHA-256: 934695cb066c8b7b3d2276dc08576ff1411f7dcd4fe7b232070a93d4fefb588f
font_01_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 18432 bytes
SHA-256: ae0ddd364d3dcbd78c51271dab2696c881ae739cd518f7a72253d395af2f0f95
font_02_sfnt_off0001211f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1