Malicious PDF — malware analysis report

Static analysis result for SHA-256 e970bf8dd9a7832c…

MALICIOUS

PDF

76.2 KB Created: 2021-06-24 04:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5570971df01c1f0da0f576988aea2368 SHA-1: 41d2932ff252c03d100fef1a6d72a68418219efe SHA-256: e970bf8dd9a7832cc35971c68da914ea2c7099e213199ebaac07ba6dedfbabfd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing the 'super-forms' plugin for file uploads. This suggests the PDF is part of a link farm designed to manipulate search engine results or redirect users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8029

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://prana.video/wp-content/plugins/super-forms/uploads/php/files/9kvh149h6usu4l1k485a36cs1v/nemodogimabogetenu.pdf In PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/trjeqpa7rdbpvcaku78d0oj3o7/toreliduliwuvano.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/oju5fve918pabui8srr12o2967/zobilogovu.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b20caa2b9---lutiniruzinekub.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/kht0frs2o137nb15te0ld1gjg4/81928441344.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/ed60a3572212abd5556854221460871c/wipamoramu.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/45650485747.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-3/20210503181916403420.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607e580b79e31---mesosam.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/fawovifapul.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/4b563c0f9f63e0f1c026a9ca00ef8392/laritogax.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/fixewifilo.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/6267b1c47493370fdf4a54441ca9a0b3/29765938800.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/memoguvunepilukunutasi.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9778637f95---1584869091.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/zamafurekuwo.pdfIn PDF document text
    • http://hasyo.net/files/file/11308952296.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=vande+mataram+song+download+pagalworldPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 5076 bytes
SHA-256: 61dcf017d5940307c25849643518f8bae6457a459e07645495afc93cb6461452
font_01_sfnt_off0000f02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02E 3740 bytes
SHA-256: 814992be763021c11dca23fed22b8bb7a0f9688c8b5af2f3d58b36f318d7b63c

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