Malicious PDF — malware analysis report

Static analysis result for SHA-256 925b4d38e7d9f50e…

MALICIOUS

PDF

82.9 KB Created: 2021-06-29 03:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1935166a6f761c1f33f1cd45555e1f44 SHA-1: ef03237fe9d25155e8877ed6738e213d87f5d60b SHA-256: 925b4d38e7d9f50e7c94734ea643ed3063d2951bd51a1cfd4af4fa0431f713d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs hosted on compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final destination. The presence of these links indicates a likely phishing or malware distribution attempt, potentially leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://poltinik.ru/userfiles/file/padukozatokogexojuje.pdf
    • http://telmeed.com/web/ckfinder/userfiles/files/64797805390.pdf
    • https://anfauglir.com/images/file/42985898426.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d0b22b512---basesowato.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/s4bs3u35hro2djv161svgpi3sa/8409721808.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3740ec667---78799800675.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c10640720c3---79429348918.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa8596ba67---45760876989.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/hafhu4vllbg6g5i6iguphsek01/vurit.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c792fbcbd3---militipekuzevotol.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/7a48296e89396f868296a38fb58bd7b4/22189448002.pdf
    • http://thedewakohchang.com/image/upload/File/3899909439.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8ee0ef986---bujunujodatobiw.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089d3decab17---baduzugoka.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccad66497b---mafubaweju.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d792c4a6041---83783173762.pdf
    • http://acecaalcoy.com/userfiles/file/nowudafun.pdf
    • http://auchli-appenzeller.ch/userfiles/files/86767109359.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/09bb4f4f99bb7f2aae34784f8487d99a/70763539560.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160791207a8642---nusifikakivuvugaj.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993b6563ed7---rabemibafuga.pdf
    • http://jingchengs.com/jingchengs/ckfinder/files/20210618171637.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/30564685d73e87a645196ea839474b03/nuxibiberemunoburovano.pdf
    • https://atlastoursntravels.com/userfiles/file/dezis.pdf
    • http://altelaw.com/uploads/image/file/87408711624.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/cce09432a9d65669a338f1d406e33ae4/70371926170.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/dugutejepo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=inculcate+meaning+in+malayalam
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e420.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 16792 bytes
font_01_sfnt_off0000fc32.bin
8efa4c9f9f04bdb658ce34d04abb061e0c1729488a9b81edb374f19cab4e0812		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 16712 bytes
font_02_sfnt_off000126c7.bin
e11779030017bf297399a4cf28ee7ffb1b8a5d8766005c9612ee2cb46e5074dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126C7 10352 bytes

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