Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd222ca993b408c6…

MALICIOUS

PDF

72.3 KB Created: 2021-09-02 00:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8c886f6b5a6b9ba1b0d29247ed3750a4 SHA-1: 20a7e1bcc58902c420a5d4042381406f2c6aa60c SHA-256: fd222ca993b408c63109f56cf75bb72a456e45721591c2ede323c24a900dd091
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to lure users into clicking them, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c003c2d34e---12319610558.pdf In PDF document text
    • https://undergroundtakeout.com/userfiles/file/pujitavajekutejisuniwazi.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/lazexodozobefezazul.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/46400357383.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/pifokulowaxeraxipi.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610ec46b92ef5---73897037020.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/guvisuvuvowedesaxewumak.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/282d67e7adb3f7c35db7d3ef8fbadeca/23869785532.pdfIn PDF document text
    • https://landi-bg.com/images/file/55363958115.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730f60e5299---32863621758.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/43519733358.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/17833512866.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/5972529238.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/nagodakibekujo.pdfIn PDF document text
    • http://saint-party.com/media/file/kaxorasozovono.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/585ccc84db3b24a64a9ee0ca6d16adf1/jovuwilexi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c27de6a834c---wefavapubetuduwedipuzoj.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/24740975003.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/6re1t5u1bkc586fl7pafpbq3s3/3466352795.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/5f5b6a47fa9c06c24e0641a02abef1f1/28833871772.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/31779249994.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afaa9a8ce98---bufesukurob.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/marifarikesotubaxodaxovev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=definition+of+being+open+mindedPDF 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_off0000bb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3A 16208 bytes
SHA-256: 87d6a3ee0cfd685f0c5c61e4285469574f76da82aa656a02cbbe3d572cfe0369
font_01_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 10508 bytes
SHA-256: ad7c4ad2f073ed60a62a30741cadac89d94814b733b53b7922e84d6e45952b3b

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