Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a307230563fede2…

MALICIOUS

PDF

112.1 KB Created: 2021-07-29 16:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b018f6d3dbffa460a230878facf3af2c SHA-1: 652b7b189c9be733a16186523aca87c6e8617f82 SHA-256: 4a307230563fede2e69b11b15a258cd149f58ebf0265f8e1837e55b00b7ff938
124 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4454

Heuristics 5

  • 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
  • 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://philabc.ru/uplcv?utm_term=how+to+get+residence+certificate+in+tamilnadu+online PDF link annotation
    • https://supermagnum-bg.com/ckfinder/userfiles/files/5325786076.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/26760844702.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/89291293789.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/17192442581.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16074c420df224---26409788769.pdfIn PDF document text
    • http://agriturismofattorialucciano.it/ckfinder/userfiles/files/38157912350.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/9294379269.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bba4570609b---bejokamijotovidatasagaz.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0a86c87f0---xifudadinevofizegid.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/qq9ob36dt7hugbrvmeiu14gipt/21267046242.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/72879578181.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becfea1838a---27832853824.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/xawukanufiwipupajogat.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/43940311233.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/15234399143.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/44469051824.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/11583919625.pdfIn PDF document text
    • http://dsagco.com/Upload/file/90825740648.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fe26411be---lolokapubuzolukupo.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16080812718baa---wunasawikabobib.pdfIn PDF document text
    • http://vertinu.lt/ckfinder/userfiles/files/kebiza.pdfIn PDF document text
    • https://noddy.nu/images/file/16551491324.pdfIn 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_off00016710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16710 16960 bytes
SHA-256: 0e83ba3b7b4764326b1af2513784cbdc7eda191c91218f533ba7d0f081e12281
font_01_sfnt_off0001935f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1935F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ab76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB76 10996 bytes
SHA-256: e8767cbd074d475bc1d01a137a15c56d1abf70ba29d9c2e11bd2d5d37cbb21e0

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