Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de69425c9551286…

MALICIOUS

PDF

87.6 KB Created: 2021-06-25 21:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 82d02ad180daf7d5747fae9fe1e6b0a4 SHA-1: 9df6526d347bb6f73cf45d3948707459ea944e25 SHA-256: 3de69425c95512866c7ee7e4aae2588cf1880288d6f79ed5c36727a6cf602cf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://study-abroad-travel.com/ckfinder/userfiles/file/tokibag.pdf In PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/502a4a0fd5aa30f0f848a1be30da8cbb/90070228702.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/41046889749.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/gitogadubogukuzewiripat.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f1d04lp9l5b0dfjd5afbph2s1/85506489190.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/o1kbpgsd4kd0b3d92rq6fbmk85/1963692603.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/r3ircn4c8iehnue4ohrmg1udk0/joxilerifox.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e1fca2a0d---424580314.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/51633683990.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1da3f2f8ef5448e0ac79daf6413dd9ba/77965872530.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/18359286671.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/72192233687.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f1e33088b---14048455927.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/94910244800.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/uvqvsajsvqsimrc7hgkrpcick0/66475611678.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf661fcef95bd19e8d69c1d53fb70eee/puwawajanopemut.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/jadatirazosiwudivu.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/bbbc9ae3bd40a07447ec1e96b3625898/pubitolafopojenojexu.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/54126145344.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e827be23d1d3037c8c5139d5f9d94ca4/mupezuvebodilovuzagin.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/jomasoxituw.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/7a1ud297cldcootbu3o8470doj/97902298880.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8ff9abcd---93775514651.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8f1e369caf445517914266a624de29ac/37641283963.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/sevekovi.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16092dc3d81cc1---12850235336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=conclusion+example+for+internship+reportPDF 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_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 16688 bytes
SHA-256: bb3609d2e442158db406b94faee6e2f028b9130902bedbdb2a8b2b752503c13d
font_01_sfnt_off00011dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 10976 bytes
SHA-256: f79131195d6994fafca12d967abba0fd37c6689c6828180bc3249d06da244b5e
font_02_sfnt_off00013718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13718 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1