Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e44125e99fce3c…

MALICIOUS

PDF

86.9 KB Created: 2021-09-07 06:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4636476e4b70fafb1d25833c51f0a316 SHA-1: 7a2fce55618c9f698d32c831728a257ab5ff122f SHA-256: 96e44125e99fce3c1bb463f055f0557658aadc7acbf7a99c27ea787a597715a3
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF-related heuristics further supports its nature as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://pixomot.ru/uplcv?utm_term=subramanya+swamy+mantram+in+telugu+pdf PDF link annotation
    • https://micsys.in/userfiles/file/kilogedodozejujeza.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/o3l8q578dgb7d5ujrerc85vmb4/29976473434.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/jotunulexixokopopiku.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/gikojizovidexe.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d9bacf15e---24929670379.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/27385183067.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/58787268055.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/f24273444fcb37e6bcd568918f4102c6/jaturive.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/sakevuzibebofuj.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/ll7l0klidii7q4333heoiu7c79/64876910846.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b52979540---3417695487.pdfIn PDF document text
    • https://olterus.info/contents/files/94762865364.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8170c359e---984483532.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/40032251173.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/mogefun.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6de135128---rofewub.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/detoxak.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/57674483017.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/8v3e0qbbvj86su2iuei54lhqom/mevizepa.pdfIn PDF document text
    • https://etadelloro.it/images/file/bomilebarozexusumogiwa.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/14032671976.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/90399929953.pdfIn PDF document text
    • http://jucal.es/images/file/lojabiriforedemedozi.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/22003041069.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f878d2da958---vixetulibudajewij.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/18748008697.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/sjngql8gd4v6e50u552b9tukr9/wojunajofajanudirinenilun.pdfIn PDF document text
    • 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_off0000e43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43A 11236 bytes
SHA-256: 8cd1c6dc1809b6ec716dc59034dfc839a71cf2ab30c535d94346e14c57c13ef0
font_01_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001164c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164C 21028 bytes
SHA-256: 9d3faee00d4e40c00fca677028d8820a93b68a54e87da1885af3641a7bc64693

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