Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee96caa28fc54868…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 14:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d2a36dfefdc7fb5802d884b7ef1a66e SHA-1: b5a95a4cede93248790c24316ee4ffc8223aac63 SHA-256: ee96caa28fc54868416bb41ff95011c90d66c9afb2f284807268530f4b02e24a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a large number of external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=genshin+impact+promo+code+page PDF link annotation
    • https://iringmalaysia.com/ckfinder/userfiles/files/50152460419.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1631896309datuvejuxugidugusowitax.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/12164258631.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/71232608427.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/pasewusilabajemikijomezu.pdfIn PDF document text
    • https://beautydent.hu/editor_up/47636951643.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/wanoled.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/wibiwaxip.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/wapugepotixaguvilar.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/40001158037.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021090615103473499.pdfIn PDF document text
    • http://tercovci.cz/files/file/teverotapajizemi.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/92958379639.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/ravutol.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/vekowofejovewilonox.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c91a6a107d---49556355756.pdfIn PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/bepenefixomom.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/56958992742.pdfIn PDF document text
    • http://uco-kampen.com/media/files/74691902265.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/21565871680.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/fubaludigedotinino.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/funasefix.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_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 18632 bytes
SHA-256: 4da35753dce8f6860bba9f39d14d509934e81a9b702c24d1a4f408909f3206e4
font_01_sfnt_off00010ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B9 10952 bytes
SHA-256: b19e165a8cd0fdefd1a0b5cd8f22d65cc2032ecd0e2c8ff51f4e5c03accb1319

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