Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b76d56139a8fd47…

MALICIOUS

PDF

85.3 KB Created: 2021-09-15 21:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4f20dce9ee46f785c2e68507ce68eb20 SHA-1: 0ef34654363ab2cc63adacfb5b0d0a812ba96716 SHA-256: 3b76d56139a8fd475d83b0fd05b666d0b8f11b66fbd057c131d3bdb5cd546cb6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, likely to execute a secondary payload. The embedded URLs point to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://mocphatreal.com/assets/images/ckfinder/files/36138479657.pdf In PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/41698409449.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613dec8c42bc6---mujuwamusoredog.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/wefubapijajorakifokuzime.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/36831494148.pdfIn PDF document text
    • http://vhshf.de/File/79412503830.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce2d13a209---lovad.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/9198063226.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/rujunaladivowi.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/77343450241.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/14499006026.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/tubobozoboxofap.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/diposapulufake.pdfIn PDF document text
    • https://airxps.com/userfiles/files/lejobexod.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/49152887503.pdfIn PDF document text
    • http://sdes.in/uploads/joresimadelofowiguwej.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/matizepofakakakaxilivi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/onjir0jtvu2ob85mft4ru1v4ko/jireboputefikupu.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/93014195003.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16135bfd643034---surasulunikifexaredipa.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161363748d8d28---27092557122.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/rabubebumujigagokuvekeg.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/janetusor.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/61844189904.pdfIn PDF document text
    • https://retta-bg.com/userfiles/61462354694.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210904073350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=turning+off+safe+search+on+androidPDF 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_off0000eb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3B 16956 bytes
SHA-256: 57d15fdc027250ea68cbf8e29867b619022b60501f76599d24a7b6d496bc761f
font_01_sfnt_off0001173f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173F 10676 bytes
SHA-256: acaaef19d0dd89e1165227ae43ebee2abf89a7ea5187361d7090664a863e812b
font_02_sfnt_off00012f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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