Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7020955b09ceb8d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-19 01:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6c4daec9cb0f6d766dcfda64048149cc SHA-1: b8f5d7a5fc03b3ed4e10b5b4400d140877bfc3f0 SHA-256: c7020955b09ceb8d23515e57bfb5ae28549383962e721fa903be9e9feba02c18
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate an attempt to direct users to potentially malicious or phishing websites. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://stayinbranson.com/ckfinder/triplebuserfiles/file/jiposuxijadelalaxujub.pdf In PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d43dbaa1b---37375782373.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/56619166123.pdfIn PDF document text
    • http://sedaciesupravy.sk/media/file/46642195436.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/19752685996.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/mubugurifig.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/20643412549.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/5026176151.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/7479387485.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/85777363894.pdfIn PDF document text
    • http://keitbg.com/images/files/tedofumekisozib.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/60147348379.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210919051728084.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/vupesa.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/35337107222.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/fatogomaxugowaba.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/23111484381.pdfIn PDF document text
    • https://petikdaun.com/contents/files/80505729242.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/97038164255.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/ludakasizosudumubomineto.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/zitovizetapimuma.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/69189169994.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/c56c8ab7e03dd7fdfe3d63f76ff5b437/30319835223.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/fefuladagerijolosu.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/degedijinotij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=omegle+video+mobilePDF 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_off0000e439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 10192 bytes
SHA-256: 37b5cb7c9a42e4301b8898edaef52929a378227b7f2fe644b76c4d92698b5008
font_01_sfnt_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DA 18948 bytes
SHA-256: 87897b0a17069b338bde99e991576276628cf60dbadf59532b4f66ba1afdb374