Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebebd48562ba5e84…

MALICIOUS

PDF

86.5 KB Created: 2021-09-19 01:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8b91dbe1466c65485d0777bdd1d30c81 SHA-1: 8b17e07ef53a930684ff218bed4842507da7fb28 SHA-256: ebebd48562ba5e84b8d6e25eb47883290f8e198b7be60a953f189e42116cca19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The presence of embedded JavaScript points to its use in executing malicious actions or facilitating the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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
  • 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://coretry.ru/uplcv?utm_term=cara+scan+barcode+android PDF link annotation
    • http://studiomarcheluzzo.it/userfiles/files/purav.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/nibojimesubar.pdfIn PDF document text
    • https://vitanov.rs/files/bopebozuvogivikukikamow.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/ligalarikeloro.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/29247159784.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/zinogekafowarip.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/rawagevamaxez.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/81647396047.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/jiwosud.pdfIn PDF document text
    • http://upnbkk.com/file_media/file_image/file/nalame.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/29713377460.pdfIn PDF document text
    • http://jjc-dev.com/userfiles/file/rifogije.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/kipawaxizokobuba.pdfIn PDF document text
    • http://bulmarconsult.com/files/lepawod.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/jaritolafuluvasarus.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/vopedobekiname.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/zunimanom.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/427118280613e13ce24727.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/24377676094.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_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 17864 bytes
SHA-256: 3dacf711b8a7b75caf073f5b48c0cf07b69b7bae37e388b8b132312071e9b6e2
font_01_sfnt_off00011cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E1 10388 bytes
SHA-256: 0aedea0da0835b7b1cc8f54bde7e01f48724f7eaab146851dff0e69c8525749b

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