Malicious PDF — malware analysis report

Static analysis result for SHA-256 174084160699aced…

MALICIOUS

PDF

84.3 KB Created: 2021-09-06 04:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1c11e6e900bb88717370640578193db4 SHA-1: 04510e692704f80cdcade44615540a71c55188e8 SHA-256: 174084160699aced9199b6192d9c158f08bcf8883e64f8e9bec2bac852fc87bf
164 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports the intent to trick users into downloading a payload. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign aiming to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=change+pdf+to+png+on+mac PDF link annotation
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/10081989378.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/jenobedira.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/1237489977.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/silakotumozisolojufinosob.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112c5ab7143d---62503159793.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/413e3c61eabe40d17454ff363bce0306/ganabugigefibetodarexo.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/34437344842.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/34954127114.pdfIn PDF document text
    • http://herve-coiffure.ci/files/pilifewa.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/054fc7b875c41ae1e375ffc5528203a5/49837339944.pdfIn PDF document text
    • https://kawanmto.info/contents//files/xapalixidulopal.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/68875308975.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/53557976193.pdfIn PDF document text
    • http://abwva.com/uploads/files/7736851839.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/zorozofexa.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/vaxopugisijafaxawidif.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/kilidati.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/nitunisufegogowaxo.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/74036904312.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/mapumexotaruwunatafifuxef.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e7a5233e9a3---3728813929.pdfIn PDF document text
    • https://ancoraeducacion.com/images/bixupokuxur.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ed569e5287cc9e7997c06c7064b47c13/tazepev.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/taxokoxoderumetawujizavux.pdfIn PDF document text
    • https://go2germany.ru/files/file/5759444082.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fe3aafec645---kosazogosax.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_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 17988 bytes
SHA-256: 133c1d93ffdce511a0e1bad6e963892c06895e8954964ec96f2638904e344b9f
font_01_sfnt_off0001130c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130C 10692 bytes
SHA-256: 7f3bc9ffc3850e42a68939f0fac207dc9d3220eb47e2a37eb7e819f504fafc37
font_02_sfnt_off00012b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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