Malicious PDF — malware analysis report

Static analysis result for SHA-256 902c29a339019b4a…

MALICIOUS

PDF

71.7 KB Created: 2021-09-28 10:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 062d943f970b1f4bbc43bde9db64de6b SHA-1: 04aa650ae9420ae5e318d7d4fd8a152146160c09 SHA-256: 902c29a339019b4a2a251aba6dc1a429d47061719b175fcc7f94375ae1b7c818
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=purani+movie+purani+movie PDF link annotation
    • http://zbigniewrodak.pl/galeria/file/wogaziji.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614f2f1680734---8231496058.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/60300935829.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/37413f71d818360393d9cf618ba00728/viwiwebonigik.pdfIn PDF document text
    • https://dyaa.club/uploads/file/setawujuzebevewanixusaf.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/71223338814.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/latajevibuxenapez.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb6539dc4c---80929511313.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/gizukunagumowotage.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/41011450286.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/92095411039.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210926135037.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/70967934021.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/lokotobopusemazuwevasipa.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/17176047340.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/80205170666.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/7191384494.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/vokereruw.pdfIn PDF document text
    • http://home-plast.ru/foto/files/58098767832.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/gopuwopelefujefi.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b9b9a0f8e---94360030472.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e4d67ee15---gomepamaxivinudumolabezoz.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/1073520359613caf21a9281.pdfIn PDF document text
    • http://contua.org/userfiles/file/zuvitofibovokivevutogega.pdfIn PDF document text
    • http://kme-kme.cz/files/file/xopugewika.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_off0000b66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB66E 17072 bytes
SHA-256: 3e9b5caf4f8b4b71a9fef0a8a7ff21bc27842bb95a85509d49bd540e0ebfee6b
font_01_sfnt_off0000e1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 10268 bytes
SHA-256: 3616f4100e47ca7929110097bb44c35ff43b489da8d0bd9e7e73151fbae6014f

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