Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdbab4bed02124b…

MALICIOUS

PDF

112.1 KB Created: 2021-07-09 03:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 565931c0a2ac5963da6cd705d07512ce SHA-1: 1b4ef3d06f169c51123d3eec9f0fabe106d3d680 SHA-256: 7cdbab4bed02124ba88a8909ef849dce4371a1b1edaa71356b2c428fba16a0b9
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, likely intended to redirect users to malicious content. The presence of multiple links on potentially compromised CMS upload storage suggests an attempt to distribute further payloads or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/a99f21bae2dd618f49e4344d945a0854/zukexufaxutuzun.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9892e95d42---dotaned.pdf
    • https://allcreaturesinc.com/files/files/wabod.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/77f707c52df86a79cc37d24694a49e0a/vetenemabemaforasotug.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/b50ca5fea0745c55546caddc63f40ffb/lifujaxugibuzetejovupimak.pdf
    • http://bawaconstructions.com/editorData/file/46280311153.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df6945af48---nezefaxepexolusomurixo.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/25tavlkjklloh4n7vjrs8gu18b/didumugilowoxeramowimori.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/d19eb52cac9879e7e57587c959195d8e/lijizenofisedomuve.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ada379f9d---91338319283.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc234cd64aa---fugogesonovesubedunone.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083023d9218a---vanisuxukedetifozutejawi.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608730b876aef---fodixexejuvov.pdf
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/57416126549.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/9d80283484e2d180ed5585dd53c84dae/sululewedit.pdf
    • https://datawire.gr/files/files/91973676855.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba56218aae3---resiguxiwixibuxupidaken.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f036297fc0---99435137905.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c96ae2ca30f---komoziwijigazidutefes.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd03256079---67702698484.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c52cdcbdbe8---nopovozaz.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/kodap.pdf
    • http://smeclassof1987reunion.com/clients/37165/File/78026735700.pdf
    • http://strahovka66.ru/userfiles/file/89328300765.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=fce+article+samples+pdf
    • 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_off00015515.bin
1cf5ba0114214b41bc002c29008c07d0c5eda58ce20991011133acefb8946047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15515 17560 bytes
font_01_sfnt_off00018355.bin
1e3268aa0e592ec96b3ede9d7e307a61778d8c82a846fa654b1f6aa42b7d6a41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18355 10532 bytes
font_02_sfnt_off00019b4f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B4F 16792 bytes

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