Malicious PDF — malware analysis report

Static analysis result for SHA-256 2390237f5dfcad66…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 22:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cb08e7a985a552bad8e0bf2e409d154f SHA-1: 5927e0b39209be567a9eab40d58b78b818cee053 SHA-256: 2390237f5dfcad66c15809a09b0a31991e6aa78974e2fa350bc532606ef33f3e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or compromised WordPress sites, suggesting a phishing or malware distribution attempt. The 'SE_QR_LURE' heuristic indicates the document may instruct users to scan a QR code, a common tactic for directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=windows+qr+code+scanner PDF link annotation
    • http://vagtteam.com/userfiles/Files/39920762644.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/povijomulevo.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/63891838319.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/22724435691.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/mosefomina.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/90039287831.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/89212950883.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/jivetewet.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/62937978972.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/bf5045416d5230cc27c327f791a38ed9/57003259574.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///33653646137.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/nokaxalaniralelofezapafo.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/62335221327.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/fevuvifexorowifatagozik.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161326685dfd94---3044031256.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/71067148623.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/xafawuzusexipofi.pdfIn PDF document text
    • https://icbacademy.com/upload/files/98406140364.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/64797236135.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/43289509151.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/42363441308.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ce97ad17b4f1096a71ad5c0192cd0d7a/89568188812.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/7f71jqp3787v3qvnmci80bc322/zozemalavavasirodunemoner.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_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 10444 bytes
SHA-256: ae5a99fe68dafdcdc9b9a99550065db187a07c7335c0e9ee164aea7df0bfab7f
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 17112 bytes
SHA-256: b373108d7392ed74311f2613aa784f6799bfed5850faa953c0dff2630a2b3a45
font_02_sfnt_off00012493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12493 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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