Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e894726d19e90bc…

MALICIOUS

PDF

80.3 KB Created: 2021-07-01 09:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0388209e7c6ea2ed6f6ae0c08b2719b7 SHA-1: 06885a0d5e2a966a0903a6aed9dac13e4699ba15 SHA-256: 0e894726d19e90bc5dbd042c14626ae3b5f15dff4d579998561fd765acdcc9df
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The sample contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. Multiple heuristics indicate the PDF is part of a link farm, with several URLs pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ubest.ru/images/file/kutimewazaziwofawajid.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc1be211f5---21196289727.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d800b12529---mupipam.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f89a1b8fe---bojawekideta.pdf
    • http://msamerica.net/clients/873634/File/50192091530.pdf
    • http://zuche0551.com/upload/file/22844972107.pdf
    • http://rollfactorytogo.com/uploads/files/sotijuzor.pdf
    • https://arhometutor.com/userfiles/file/80659547931.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0e949e8e8---nexuxekudepukisokinexu.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/89a4aa5aa5674211f46e69b246dbd935/fujodevafejat.pdf
    • http://sincaremedicaltour.com/js/upload/zafatigebesajiwadimeko.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d2b71f394---84742795316.pdf
    • https://briljant-maleri.se/UserFiles/files/88663670166.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/0ou5jb3cdvp9dd2rqghr3tr1u6/reninoxudexusoteridakij.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e59f90396e---dakamewo.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e232ba75c---82184341317.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c255d63a1---14801814507.pdf
    • http://topcudental.com/img/userfiles/files/kogunugobupivivod.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/3ea41df159cc128638d9d6bf99bce377/48358565868.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//31773702083.pdf
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/96657041936.pdf
    • http://esipro.fr/userfiles/file/kajipafusolotujemanud.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16097ef9813bc4---55657187249.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=consider+the+random+variables+x+and+y+with+joint+density+function
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcd3.bin
44febf4ff92a04961436f162ecb260cb4ea8078bd5df49aad8ff4e5c546a6a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD3 17300 bytes
font_01_sfnt_off0000ea80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 16792 bytes
font_02_sfnt_off00010291.bin
325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 16084 bytes
font_03_sfnt_off000117be.bin
8e4e4f542d4c0145d26784a4b44b25ddacb1f4a039a2f7f08c52be1cb13f1cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 11512 bytes

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