Malicious PDF — malware analysis report

Static analysis result for SHA-256 3534759453a589f2…

MALICIOUS

PDF

295.0 KB Created: 2021-07-03 02:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e0cbf7ec3161540321fb5684831d014a SHA-1: cf048cacbab8fb5ef09d7e02d4dea020e2241f1b SHA-256: 3534759453a589f2295a11c883b149383f7c9e04985b7c24b1a5666e951fc637
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with several pointing to compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and compromised CMS links points towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

Heuristics 5

  • 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.
  • 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://garglob.ru/uplcv?utm_term=so+say+the+truth+post+malone PDF link annotation
    • http://anhuicrew.com/upload_fck/file/2021-5-29/20210529185902373920.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/kadefixurusigomagewoso.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/ximonepagabufogitesoven.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608726d6cfc66---rovopefadenirovilat.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/81099628893.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/edf2e150d40d1da7a1a8bf102e5833e2/vonatutawibo.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/n5hthpuospttql355n8dnqn0r8/sebeve.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6b5a77bd232e08d5d345fe353f8ec17f/97161006848.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092432c1db45---gadajokagimopiziwodadog.pdfIn PDF document text
    • http://www.moyekolodin.com/files/mixid.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f18fcf69a---61661506722.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a9610fa34---fafemivuwuropuvukuvevux.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/d1d8c93132d0d3acb185fd0d8fc82f25/janadoremipavujuw.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/46696097df7d4f99aacf9f559a3014a5/liritepuzedomiful.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/50821108351.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f57029e169---25260580854.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/rumimabidajexuju.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/26cdcfnn8tbvvvoahgddalpef8/1282915510.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbcfbda521---muvumipelofud.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/g6bnt3q5e66510no2o0vrv4g84/68194325155.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097312fb137c---17179206804.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/505d693f5969c5279c6a3a3126ea3dee/bokupegokexu.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/69284bd32238fa7d72d765c8fef4681f/91760048058.pdfIn PDF document text
    • https://shopabrang.com/images/files/gikegiminu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00041cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41CBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000434d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x434D1 10716 bytes
SHA-256: 6e2a04648d126e0d85e42529faa2bea98ce152c4f8cc0215f09fafd2fd5f019f
font_02_sfnt_off00044d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44D45 2144 bytes
SHA-256: ce39cd3d119ac5bbf84a393f0f7732a4c50b926c98741f90ee89733a1ab3c11a
font_03_sfnt_off000456b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x456B9 20992 bytes
SHA-256: 74178d59796e5dca693d55429008629ab8f44d6ff4883f18c37dbf3fa24573db

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