Malicious PDF — malware analysis report

Static analysis result for SHA-256 5066640a92015b27…

MALICIOUS

PDF

95.4 KB Created: 2021-07-08 07:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 69a271d83c638041418211261b992468 SHA-1: 626d6729f0a0c134c32cff5481e07639646e5af6 SHA-256: 5066640a92015b27f99459dba1616b831f50a78adb3165a702625abaf56f9cf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or link-farming campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or further stages of an attack. No scripts were extracted, but the presence of external URIs and the overall structure point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=period+after+d%26c PDF link annotation
    • https://asset-books.com/userfiles/file/ximorifikavagogizepa.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/bebiv.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/d821b76704db5d03cdaa0653d85e36bf/jenojozul.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/ed8a2ba477d78a88fa7ac8b99f8ba936/68725308759.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a143719fc20---91589434391.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090f2198f8f8---wewabag.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/30027693446.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/pujadeluxonofofo.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/gulujujerukiver.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/ralaluvarotajovemusikuja.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160848699b4122---47357074055.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160783a7fb80e8---ralupusugubupijirozulave.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/lirewufopunirinezexokova.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/av966t8393tl6fv6gcbqluk2bk/getipozadade.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/1187402691.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bc6a91800---jomekeguvokome.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d365b7ed923---lapozuvekuvoni.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/vgbrldqmt5v9k8tr68e9luud83/nageruzonosu.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/27714000347.pdfIn PDF document text
    • http://amdind.com/userfiles/file/logusekojixiriwiz.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16086656a57fe5---91616626008.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/zomekajimowas.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcfc289173---jewofexubuguvosewo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB6 17832 bytes
SHA-256: cfbb74bb65317b111899b1dddb2a1fd05e39e6436f9136f1c56518a7077bbb46
font_02_sfnt_off00015a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A81 10028 bytes
SHA-256: 750d458fb5fbd3cd21331fe1f53d32d61aa6de53366aa2dbe55df6d47dda6c04

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