Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbf610ba0fbb498…

MALICIOUS

PDF

78.0 KB Created: 2021-09-19 02:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ea463a38e0e453cf1d69d7b0f2a15f12 SHA-1: e1415e5706e1d0f57c3d466ed8dccdaa827a9cf9 SHA-256: 1bbf610ba0fbb498ab4a85d8dfc0f059befe1ab1be0803fc38b28fc9eca4b0d0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it attempts to redirect users to potentially harmful websites. The PDF's structure and the presence of many disposable links point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://archism.ru/uplcv?utm_term=cricket+streaming+watch PDF link annotation
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9d8a44e1f37cbb80659969bd1e546b24/liruniza.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/43314154447.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/90577540855.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/12400613296.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/77482429139.pdfIn PDF document text
    • http://terminsk.by/pics/files/fegeximepapegefuxadarubux.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/jegurupexu.pdfIn PDF document text
    • http://getem.eu/files/file/21327066578.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/28345915574.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/24323872253.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/pawaninorixidinisepawo.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/vizadejiniw.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614154c3568ed---sunuxawidusutivokuz.pdfIn PDF document text
    • http://jaqalsports.com/files/file/686949156.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/zinigobavuxotemusadepolo.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/xivuzebozedijano.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/81469475144.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/jizanu.pdfIn PDF document text
    • http://zimmerei-possert.at/16959127491.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/83604019541.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/12483470708.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/rurazejivewefugojati.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/64755072408.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_off0000cc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 17520 bytes
SHA-256: 9a7a765732306fcb06ea7ba439931553dec7d393c9c1220d49586ed079f8190f
font_02_sfnt_off00011202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11202 10720 bytes
SHA-256: 6bdacb0a241966b8b672e9746df79a39a482ff7f06cfdb608c33c6eaa9bde6c5

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