Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9abf2074385491d…

MALICIOUS

PDF

89.1 KB Created: 2021-09-15 15:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7df9b5c37e2dc06ef51b616a024c974d SHA-1: 2e521204f80a64cca88a3cf1d75b2ba3d22475fc SHA-256: e9abf2074385491d597f71e7ce996857f920a472f48edca9192b4e8f8a6930e7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to unknown or potentially malicious domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a deliberate attempt to create a large number of links, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://malabarmail.com/ckfinder/userfiles/files/dogagafoxase.pdf In PDF document text
    • https://go2germany.ru/files/file/pomaxegoruviwenisepixaj.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/samikogoro.pdfIn PDF document text
    • http://cpils.com/userfiles/file/manezovogokodav.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/kilejefakaxefejewenudib.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/fuzijalo.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/lanumamulap.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/60787308033.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/94446037376.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/60042281481.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/mibesiliganilegusip.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/28644747829.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/kizenuwolonuwisubagibos.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210915142007.pdfIn PDF document text
    • http://st03.it/userfiles/files/48756890546.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/mujapazuzujofebadi.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/161417a38aff00---tezitozedanesup.pdfIn PDF document text
    • https://ratoempat.com/contents/files/ziwerejorukemomexu.pdfIn PDF document text
    • http://www.77ice.com/upload/files/lobirumezixewalurilixiru.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/godutuwokitokovubabip.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/sixoxadixekazaga.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/patevigubatozim.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/94122570223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=2+0+0PDF link annotation
    • 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_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 23924 bytes
SHA-256: d9f61b65d37fd1b9b6dc5d4d9ceadf69a0a77d3a123cadc6440abbf505b9050a
font_01_sfnt_off00012a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14234 9224 bytes
SHA-256: 0be8b1b5644bd9770cfabab33c311b3fdf5a69184854339ce7b12da33054951c

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