Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98ea02e3d1b82e6…

MALICIOUS

PDF

87.6 KB Created: 2021-08-09 11:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5fd5e44895f586f574833a3b99b8cb63 SHA-1: 53478f0e86a0118036f6fe6894180a0c7746d11a SHA-256: e98ea02e3d1b82e69d4c14d0e37c1e7339a1782c7a6034318d3edee56a0eb547
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware download pages. The embedded URLs and the nature of the link farm suggest an attempt to exploit user trust or curiosity.

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://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/451c7676f34f8097f80fd7c3f8c09548/pakuwanowigup.pdf In PDF document text
    • https://recapress.com/ckfinder/userfiles/files/55413546522.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/maruvovufawixanija.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/df5edc7847ee4b2acc46967e885d10f6/97303654207.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/mekobab.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3dcad42f6---95613059286.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942999aa933---pikokugivosi.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/talezepomawazuxawufugos.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/7u10a6sbuthcckkvmt4cgkl3h2/puxemaxopinimi.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/pozipadazi.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f744c9a16---72333873232.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160947dd65a9ee---83999025762.pdfIn PDF document text
    • http://faradbox.pl/files/file/28938503970.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16088b64f71095---69911816380.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/4ee638ae91bce8773120f6f2afcb5153/58133800263.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/u3m0ab2isujgrvr472mkj3lrmp/pururigenalulaguxovoludof.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/6959add76b83b3deb9496f7d5e5cc02d/nujajujuta.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/4v9a5i4k48do8ieasal77suhd0/98569619223.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b19c3c9d309---movirizamupebewijiwubevu.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/66763687644.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/71775471268.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/4994513436.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/uf6bh82dd6us7vvk25git3h302/4254532697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=kabir+singh+full+movie+online+hd+720p+free+downloadPDF 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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 11524 bytes
SHA-256: 11c00900b93ac14697b1d403ab26a0045ca79eb3f9587cb1b5ab2c7f4d0b681d
font_01_sfnt_off00010635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10635 18476 bytes
SHA-256: 1d330a96fe046922679edd95d3edb1a4f823cac513a1c4e4215bce1187dce4c5
font_02_sfnt_off0001354b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1354B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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