Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d6e6e43bdfc928…

MALICIOUS

PDF

77.8 KB Created: 2021-06-10 21:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a0e54a14c80fd4d94c85ff526603860c SHA-1: 6b1ca9344d76905dc2d5100b567e8a282561a90d SHA-256: c6d6e6e43bdfc928315022a47586a03bffe6b123fb3a9c85827724d17f1f3dad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malware or conduct phishing. The embedded content, though heavily obfuscated, likely serves as a lure, possibly related to video game cheats, to direct users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://wastran.ru/uplcv?utm_term=invisible+cheat+warzone PDF link annotation
    • http://aucoindeshalles.com/menu/file/73279006003.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84cf246e2---97123802313.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/46baf1842d67a77f6f4eb90779c3105d/zokosogekibened.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160782a5704a29---fepavunavifufowimexo.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/vuwegujafebe.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/0d9558a357a3b75d7614b9827b8a9971/23414855365.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/wizujivasadutimebupe.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acdfc70c7a2---53208049296.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a846bf57636---98505691934.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/boeu8i1us55qn6thk5ji309v31/fulevovovedibobuposavew.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a355bf0af6c---pumajifevarufexan.pdfIn PDF document text
    • http://bollywoodsalonskokie.com/admin/images/file/30715133309.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ll9roqnkl7tc26u9qd3sil94mt/rijabamafejubaxumofage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE283 5168 bytes
SHA-256: 8125531f42a12ab68776ba2f84219fc2a552a34ef8afe7501ef941613cf86443
font_01_sfnt_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 4460 bytes
SHA-256: 433bd06c4ed65d2cfd5f2d3176829289f58f5772f5ee5aef0e8efd0392d1963d
font_02_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 11008 bytes
SHA-256: 50901ada019948c7c5f3c6fa1fc00a76cdfa5c6556be6ecfeeae2709262bc367

Open this report in the interactive analyzer, or submit your own file for analysis.