Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47215aeb7e82f6d…

MALICIOUS

PDF

85.0 KB Created: 2021-07-13 23:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3d72c63f35fce025393a5750c33bd8cb SHA-1: ff3f026580b332e4c98c6758df295fb212254919 SHA-256: e47215aeb7e82f6d1fb0fee79c006b0f7c2eea6e71b50be05a16a145289c3c02
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URIs that point to compromised CMS upload storage, suggesting a link farm designed to distribute malware or facilitate phishing. While no scripts were directly extracted, the structure and embedded links are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac099c8659---zutopukipunofurisekal.pdf In PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/82264817059.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/58271066941.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/jemebazogesajokiteliru.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a843ce110e122cc7a9de6ce01c86a502/xepasedat.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/lixefamasudeb.pdfIn PDF document text
    • https://webfox.net.au/wp-content/plugins/super-forms/uploads/php/files/f12e414de948305a461068710bb12987/rugununikiz.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/6aus3l3kkf8omtfggcqgdla62c/davelujifupume.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160820dd6d257f---52092748316.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/bojubonexiwalojivikabug.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/39890799649.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/9v28phd1ubndeecle6h0as7q21/wotozukozevu.pdfIn PDF document text
    • https://talleresimad.com/images/subidas/files/jasevugizosifukotofibuti.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/45008784972.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088d31f21424---foleb.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/22216282395.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/52399021809.pdfIn PDF document text
    • http://blackwingsexpress.com/upload/userfiles/files/59250832034.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160747f8502378---49800432578.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160876d02a5aae---kizumux.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160e7bc790eef5---faziginijam.pdfPDF link annotation
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e95292f1---tanelipesek.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609487eab5a8e---mizar.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/nusodalawabolozot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=puppies+for+sale+vincennes+indianaPDF 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_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 16440 bytes
SHA-256: 5a9a34cacecc2aff3ad3b28aa960187c3dd803a04f5b4e4bb619f73fac267a27
font_01_sfnt_off000115ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E01 10680 bytes
SHA-256: ee94d2fab40b1201107731773b02cc9edbeaf2beb3b78a831c7b087adf41c4d1

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