Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e9e0877077ea6d…

MALICIOUS

PDF

93.5 KB Created: 2021-09-21 09:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 965cbd7dc4e9a4abdfb868ceae499644 SHA-1: 6018b72ad9a13116ba24422b6ec9a48eb5d20cde SHA-256: 10e9e0877077ea6da7f68e0b214a66f1c46783b9009affc536a867a230a6c04a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The embedded links and the nature of the heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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=popcorn+time+android+tv+2021 PDF link annotation
    • http://seanmore.com/userData/board/file/38981679140.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/nemakazirofafowegede.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/449412cfc4a6f166c190942ef08f8b60/xogapovemilep.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/75081071224.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/55843464784.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/b2qsc6r517qc1bcsj968uv90dh/lisekakexu.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/14263317752.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/72354137542.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109150446511150.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/90050703011.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/39303633966.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/jiwofujupivuvemalav.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/14488411782.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138f2c112efb---99686126707.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/26434328328.pdfIn PDF document text
    • http://jawarakreasi.com/file/38882495492.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c2f2a4ff91aecbf6da6adbe667aa2eeb/86979991006.pdfIn PDF document text
    • http://scsytech.com/upload/files/64905930042.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/lutoxalawuwezipomeda1630854284.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614368ce79289---nevujaragubuzuzur.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/43374990135.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/kozusinipawadeniliwojubep.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3rnd4j6d57l4f7cf754go9098o/4423907564.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346409383c2---kapejulisadoweluluge.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_off00010420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10420 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C32 19248 bytes
SHA-256: f290c1a4392bbbd6a340c012fdab66c8b9cded3b89733454e8b195dca8df4a9b
font_02_sfnt_off00014dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DDA 10824 bytes
SHA-256: f92dc5511f4ba881d26ed309edc29ae343cbd79051256f70c34528831673b8a5

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