Malicious PDF — malware analysis report

Static analysis result for SHA-256 362a5522d1181bea…

MALICIOUS

PDF

81.1 KB Created: 2021-09-14 17:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6b6b116e961b382039cf7f057d9f7a98 SHA-1: 1a127c8d9e6fee5be4412fe905938a6681b0eff7 SHA-256: 362a5522d1181bea8528d2d7f46958db8a87d5fa426b568a497482ff9f6bf821
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. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://wastran.ru/uplcv?utm_term=bitlife+full+version PDF link annotation
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/be98725ce078bb8133b2d3a51766482c/4813327024.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog/file/57115192145.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/j0e5v6uvkqvu91av1qj8skpldc/37246332132.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/tajefiri.pdfIn PDF document text
    • http://cpviettin.com/upload/files/xebivap.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/73603779180.pdfIn PDF document text
    • http://pradakshinam.com/fck_uploads/file/48017011210.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/78270921364.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/52871482583.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/24132359857.pdfIn PDF document text
    • https://anaksemut.com/contents/files/noxine.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/4386187953.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/fagoken.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/lekotor.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/74548866979.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/21997231289.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161314b294c480---gufebokilawemigupatufono.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/68175583672.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/suzebawufopafaxowa.pdfIn PDF document text
    • https://digireg.org/upload/tivimelalurowim.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/82886869246.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/puneruwu.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/skfep73pk3sbq3nptiilcrmo0f/73613333612.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/xokij.pdfIn PDF document text
    • https://rubfila.in/files/file/47860166716.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_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 17756 bytes
SHA-256: 45189d95423d34cdfe373173f68334e9605ebe072ebb159e1c04c663c54a3298
font_01_sfnt_off000107c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C2 10264 bytes
SHA-256: 83ace56a1c7a1ed94e6d45f95475f5956a4397b5c3f76c66cb19190c0105c3dd
font_02_sfnt_off00011f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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