Malicious PDF — malware analysis report

Static analysis result for SHA-256 505a502f92424e55…

MALICIOUS

PDF

73.8 KB Created: 2021-06-12 07:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ce11fcf23fd87bb4a45625e1b140858 SHA-1: aa19ca466b7a689e263f80aac423eb6bac858d36 SHA-256: 505a502f92424e55d324e0438c52bfa9f19fbee668eb0f1ba6431159d25d0a91
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://laborke.ru/uplcv?utm_term=obstetrics+and+gynecology+dutta+pdf
    • https://systematix.pl/userfiles/file/71626877476.pdf
    • http://cdseoulps.com/uploadfile/fckeditor/file/sedulezelaxudajerimugusik.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa705c67ec---98003693329.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/1hma0mnn7jufb43r35cukbp3hn/81062896144.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c0db741bb7f---74363164864.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/de5ce9233c49ecce9f4d364b13dec398/53410683006.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/bfeed7268849e99b3f2142ed84bde641/fijemeripofikedabe.pdf
    • http://asfalon.com/__files/file/56832719744.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608323cb98f6b---nelejifobuv.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080366cca698---tufemomigetozun.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b7cbd1e20---99036995284.pdf
    • https://binarbaid.com/public_html/userfiles/file/67438058496.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dafe7947e4---takufusigejazakulakiko.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ehsu8e29n315ljrpv53kp75djh/soxavedixazilemawotusix.pdf
    • https://yssnewlessons.org/UserFilesTwo/file/19247699948.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b96150a65---fipunogosanegogesiberobap.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160871e4272ae4---jemadizewavuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e397.bin
64bd69301c96cf42d89670706d2061959b7cdf1dae8222c32c51dcf3eef0e513		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE397 5592 bytes
font_01_sfnt_off0000f6a9.bin
b635ade11021cad3e6baabe84a61ab4120a540d3fe13bba58d4abadef6d4b697		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A9 10388 bytes

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