Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd69fcb41645b5db…

MALICIOUS

PDF

104.9 KB Created: 2021-08-10 11:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3f35a2b8fc8bfa251e1133f98d919d85 SHA-1: fd117198d5ed2ff8edf2e4580b6f927288bb2082 SHA-256: dd69fcb41645b5db668c2e1b8ee6e325ed50b701baf19d42bd4b131035c641ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. 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 overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://pixomot.ru/uplcv?utm_term=ausubel+teoria+del+aprendizaje+significativo+pdf PDF link annotation
    • https://familienbilstrup.dk/userfiles/file/89541990244.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/3u95nrilan7r89jfpc4oeall6l/61893818282.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/ef106110ab31a3d10b93eddce63d6a54/50044247779.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/95676295270.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/27e07d9beb5f80b365ca4ef41758cebf/1968909561.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/6kikhsclr0qgkaitodau8ibnep/jabejuxuxoruxabim.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/dutanogot.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/aaeu4r0321c2lssh493qmq6u9i/rabewirinibipumovobo.pdfIn PDF document text
    • http://snsi.jp/image/news_file/disidepeviso.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e37bb7613---29021456596.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c100a86a5a6---46425613749.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/15241f1f7aa8ab9d97fd9a6f47022a94/20808437737.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/42448740510.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bac9fdb5242---28959506350.pdfIn PDF document text
    • https://inncredel.com/uploads/bunusonubipidubijamefaz.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/56262003883.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1516e69082---86607225456.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097731b5a232---44816550285.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/milafogurizejape.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/86959784337.pdfIn PDF document text
    • https://vpntraffic.com/upload/files/fuzebenu.pdfIn PDF document text
    • https://drlanda.hu/user/file/dewawazepubatevu.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/vizupojuzilawitoku.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/70547e4047979d639b7b072ab5cfd125/99795887096.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1610dfdd0e1f68---5551553289.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/20262624469.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/f20ee5e59bb6b324e047e15cdf7b2b2e/domufebi.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_off0001316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316D 11272 bytes
SHA-256: 43259bf4d978978465018b7a2d04bbb252413809ec515ae342a11d1bf0dc4ccc
font_01_sfnt_off00014ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA7 18420 bytes
SHA-256: b283279f9d2654c35cbd70fc63b204db303cf5909f872e2b1f59ad1c5759e754
font_02_sfnt_off00017ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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