Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ef8cb84754e4c7…

MALICIOUS

PDF

75.7 KB Created: 2021-02-15 20:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf467728d90576e6cfc9113cada5328a SHA-1: dc2e71ad000df1a4cc1c5a83cb59854dd00721a8 SHA-256: 36ef8cb84754e4c7cf2fbf31c95ceb2330a0b27f3b7825b757fd8530e3c10a0a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URI that leads to a URL disguised as a search result for 'hunting camps for sale in ny'. This URL likely serves as a lure to trick the user into clicking it, potentially leading to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=hunting+camps+for+sale+in+ny
    • http://gvidilon.ru/sonaluriporuzuredusopuld7tpm.pdf
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5fc78b20e3150.pdf
    • https://static.s123-cdn-static.com/uploads/4490376/normal_5fefecc6c697b.pdf
    • https://cdn-cms.f-static.net/uploads/4476590/normal_601484d920ef6.pdf
    • https://cdn-cms.f-static.net/uploads/4458827/normal_6026d526038c4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lonidur.epizy.com/56441571659.pdf
    • https://s3.amazonaws.com/wutogugej/41097346023.pdf
    • https://s3.amazonaws.com/kudufigunabi/php_ajax_form_serialize.pdf
    • https://s3.amazonaws.com/jedaxopopuko/momipejetofebametof.pdf
    • https://s3.amazonaws.com/woxotopapozokev/employee_comments_on_his_performance_appraisal.pdf
    • http://sozanizitug.epizy.com/ligolobuwidifozurevi.pdf
    • https://s3.amazonaws.com/mulerux/asco_sep_6th_edition.pdf
    • http://wirudulobaga.epizy.com/printable_counting_worksheets_1-_100.pdf
    • https://s3.amazonaws.com/fomaralunex/english_animation_series.pdf
    • http://puzexexaniledow.epizy.com/widujomun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0e.bin
3eed979f0b412b3487a38f03cac23cbf7268e4360357254b60da154d77613b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0E 5400 bytes
font_01_sfnt_off0000fe69.bin
2c42ec5ef129853f4c362b654da9e1cc340145b3499fb7b7d326624bafacd9da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 10324 bytes

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