Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9d0c6a341be719…

MALICIOUS

PDF

89.6 KB Created: 2021-08-07 20:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 047633177ba904b44abb2d7ae67a6e5f SHA-1: 378a0b7d74df12e3336c2d829141ecb7b7c3bc50 SHA-256: 6a9d0c6a341be719792153332aa1f4dea4e5501e5c233dd5bf4cedcc01eac009
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.reenactmentmarket.eu/images/wyswig_images/file/bewusevewe.pdf In PDF document text
    • http://asiadomainstore.com/userfiles/file/fifabefa.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d3fc5dd7cda---36768187178.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/4118423132.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/juraxer.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/zeterulawotipobekit.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/b5a5df84c17294747238f5ceac5fd829/17172977390.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/36403957156.pdfIn PDF document text
    • https://atl-50.com/files/file/74993626436.pdfIn PDF document text
    • http://coffee33.ru/archive/file/pemevumarodi.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a18e3e623---najavebakoz.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1fd5fb82dc---59516677976.pdfIn PDF document text
    • http://cecev.com/stockages/files/safoxetewevetekawoze.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/busogaborivisarikuzitojir.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/8m6h1ogspubmj80plk9b7nesjn/komolodudonusegurof.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/gerogetisepugiwuxazutaza.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/661b5bf5b58c2ce7eb25656d608b9ed9/buxipulekukomebisaper.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/9f3c83a66e0e0c031a596c72cab67ad5/nigeli.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1096027098---21148908975.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/wotuzulo.pdfIn PDF document text
    • http://guinyardfamilyreunion.com/clients/62985/File/luxikogorosatana.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/zirenekisokeperorunonasi.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/70241128995.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeedc418b9---fapoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+download+gta+vice+city+for+free+on+pcPDF 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_off0000f927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF927 17352 bytes
SHA-256: abd298f7f79a1b051968e1b48fa850513d9be268762cfdf62b273c4bb2f34eff
font_01_sfnt_off00012681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12681 10884 bytes
SHA-256: 96d751ed89c2669e68bea20f28fbbbe47da5cfa75babd9b771f77965c1d86e39
font_02_sfnt_off00013f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1