Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f03e128bd8dfdb…

MALICIOUS

PDF

82.5 KB Created: 2021-09-16 14:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 29b77b5e69299792a3f56e7ed677a130 SHA-1: 968310dcd2ad526e84b70201382541d7db174209 SHA-256: 12f03e128bd8dfdbf272e6d36f7f5d3627081113222e119cd270fa6318d3a8f1
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to obscure the true destination. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://abwingscolley.com/uploads/files/nogirafudaveg.pdf In PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/96005371854.pdfIn PDF document text
    • http://roberlo.cz/www/files/file/sotomotupaleguxitomi.pdfIn PDF document text
    • http://effekt-film.de/files/file/11593344738.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7b5be184---wuvufigi.pdfIn PDF document text
    • https://fivetc.net/uploads/files/nuduvutevikufinoxisa.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/347lq2e0qqam8jtl5n00er41dd/bokunanaxekeji.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/fonsldg233dm11qghbub04evll/97061254673.pdfIn PDF document text
    • http://a899.net/userfiles/file/likerujepazujuxekexiseru.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/vowamupejezolavefozefuvil.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/tuzofet.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/32406901490.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/78432139672.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/zagagefojewo.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/dovuju.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/30380670712.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/ruriromuvapamilew.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/86034364168.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210901161717_d5j2w8.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/6pp8eb9kckiovoonuilrt5c6mb/bisoz.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/befemilovijevo.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/60812196141.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f08ece185---guwuzelonubasol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=friday+night+funkin+apk+latest+versionPDF 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_off0000dcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 17856 bytes
SHA-256: b5fd634cb2b92f85e6ae2210dcb5a01df59a0fb83058ca06b393ea198071a3e7
font_02_sfnt_off0001230a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230A 11124 bytes
SHA-256: 880358b1bb97604e0c26d0e2c98a15a50057ef4f20971f09149c1ce7aea969e3