Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30d9b52baa7f5f8…

MALICIOUS

PDF

92.9 KB Created: 2021-09-08 17:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f9a8e916d879193929dad15d408550c SHA-1: 7073dcf870b7f32f43bdcfe5f1ce2d890e19f8eb SHA-256: f30d9b52baa7f5f8f5fe0eb05960e68eb6e805ca66a8b7df7da8394e2b053e12
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://huntic.ru/uplcv?utm_term=makro+ekonomi+rudiger+dornbusch+pdf PDF link annotation
    • http://fmi.lu/userfiles/files/55652143458.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/20166711704.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/40434892995.pdfIn PDF document text
    • https://coil.hk/upload/files/26795591204.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/46484894210.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/kowubefeb.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/88822051187.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/vafim.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/47667205396.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/kusedolumazomivezopem.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/29663396832.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/943ed18601c0cb9f4be70a082994ebf2/delafepavilugo.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613012142dfed---pafepoxerekujeweki.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/66610108035.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/58116489181.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/kosavojolubolezajebo.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/puzukaz.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/29168741007.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/86601562548.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///94302837034.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/64345903600.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/6304446189.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16136f5c00d7f6---talijanexukix.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/wunuwupinifipusigoloses.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/ronifejelajomijokisijitap.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/bejasonibonegigejonu.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_off0000ffae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAE 11248 bytes
SHA-256: faab653c461cf5266ad72e9ed898afbdf7df675caf8a3dc28532145d7d3e6df1
font_01_sfnt_off00011965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11965 20320 bytes
SHA-256: 641ee6e3d9ed05c31cdb23a56889435fea9a333e1d6fc86d54ab75f488d4a843
font_02_sfnt_off00014beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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