Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba62605f8720e663…

MALICIOUS

PDF

78.7 KB Created: 2021-09-19 14:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 51465b5e9061efd0455c87a70638b550 SHA-1: c6536063a221632e7cfbdeda12895ee5ad3b911f SHA-256: ba62605f8720e663a3cdc56c03a3565931dadf1ce3349125cc4847c850f2c37c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains embedded JavaScript and numerous external URIs, suggesting an attempt to redirect users to malicious websites. The PDF structure and embedded content indicate a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://huntic.ru/uplcv?utm_term=30+free+ig+likes PDF link annotation
    • https://ccaquebec.com/userupload/files/nudakajexiraluwo.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/domeganunenexojikapeneluw.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/zogidokupemamezejugup.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/73346990088.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/gavojowo.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/gufazibapeleridoxikise.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/noguta.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/40068740230.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/raduvazibopobevufata.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/12516378641.pdfIn PDF document text
    • https://terracell.pt/images/file/mopomi.pdfIn PDF document text
    • http://kccmaul.com/files/files/supofevijeva.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/jonererixakuxalakotu.pdfIn PDF document text
    • https://norservis.cz/files/files/439982672.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/62454875369.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/11215816825.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8df56c6c5a05fd2252d48739cd18330f/56796884322.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/buwatadok.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/jizema.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/67372433009.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210904072557.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/gasajixagepijazav.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/081819093997.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_off0000d2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F9 16928 bytes
SHA-256: 99ab63eba8176e186bd3d7df40edc6d19b3e5d884866ecf167708c34541a63bd
font_01_sfnt_off0000fe75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 10196 bytes
SHA-256: 40286670411044063ed96f2a30cd1c4191f5d1d8b30a1ff6bdb3ecf07e9ac945
font_02_sfnt_off00011560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11560 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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