Malicious PDF — malware analysis report

Static analysis result for SHA-256 8971fe6f9b7ca8ac…

MALICIOUS

PDF

94.5 KB Created: 2021-07-23 05:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0e37979f7e014885278117697383941 SHA-1: 00fdc0845f1421a35dea00d4d23c22bc5915533a SHA-256: 8971fe6f9b7ca8acb60eea72fe0f8971d47eeed56ab9a6a96447297d1fe8e97e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or redirection scheme. The PDF structure and embedded links are consistent with attempts to lure users to malicious content, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/162b94dfab43cc22be4cc99ce347b3f7/gamixuxukadenusitelukan.pdf In PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/a543e392f5804d3c838e58ba39f45135/livojisari.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/58390812510.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160e9106432361---13028344692.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f215074666a5bbbcba2fc1a25c352dc1/wemav.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2453ceac10f23ec231997a1397de24bd/97497013313.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802e90c7978---7759222739.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/vopevika.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbb6379e31---21365060509.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/b7f12887c726d3e96eed1a44031c0a2e/53481628235.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/42a6b92857d1214e68b52c67cb4b94ee/xenedinupopadafebow.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913ac50838a---38324698292.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/31971562829.pdfIn PDF document text
    • http://novichiha.ru/pic/file/1326453309.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/5360604734.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/b1aa8577eae61665132d38f759d7b43c/38844517039.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///buxuradowapugixid.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/03f601bc19121fc188a0301462944a3d/44856936094.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/69331552957.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/piravoxusakiginup.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad14321bcc8---litepepufubupudigizepe.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/dilozibudozatagi.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/safalitujaguvowawibonak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=expert+pdf+9+business+editionPDF 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_off00010bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF3 18080 bytes
SHA-256: d20c3ef49030870e34599fca69db4b59a987374d01cbf9b7f40b7cade9eb2b0b
font_01_sfnt_off00013b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B57 10776 bytes
SHA-256: 0d0e683ebd9c18feecd342324c98c3d12f6cbd0e64f8892421acc58efb199d7b
font_02_sfnt_off0001540d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1540D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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