Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c13b7d0164e0011…

MALICIOUS

PDF

80.6 KB Created: 2021-02-15 01:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94ae901bb1b0a195c3f94b2f8dac09ba SHA-1: 7b9cc9cf1493ffec9b47f1251ab6afaf10a3deae SHA-256: 2c13b7d0164e0011da58867541e934b07d9aaffe6595dfbdde846486ecd5d947
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document used as a lure.

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://druttle.ru/wix?keyword=backyard+revolution+really+work
    • http://golesaluwo.66ghz.com/whatsapp_jar_for_nokia_230.pdf
    • http://muzhskoizhurnal.ru/failed_to_synchronize_achievements_u6zpou.pdf
    • http://dedotiroviwef.22web.org/naxegajobeveramabasus.pdf
    • http://romeita.space/kilezeginujilinofurot52yx.pdf
    • https://cdn.sqhk.co/sovanoniwuva/gcjgUjb/horizon_talk_phone_number.pdf
    • https://cdn.sqhk.co/sixojifez/nZwWcje/parent_plus_portal_rediker.pdf
    • https://cdn.sqhk.co/wofunukasu/dodNdij/2288749548.pdf
    • https://cdn.sqhk.co/bipokagiti/hitNieJ/zebati.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/muvevanepen/jokegafirikovizamurodone.pdf
    • https://s3.amazonaws.com/ditiruz/d_letter_names_for_boy_hindu.pdf
    • https://s3.amazonaws.com/gasodamuza/7823696682.pdf
    • https://s3.amazonaws.com/rodigapigeta/assetto_corsa_xbox_one_code.pdf
    • https://s3.amazonaws.com/nazekisigiduz/50701396978.pdf
    • https://s3.amazonaws.com/bejideba/sogijazegexulenajivax.pdf
    • https://s3.amazonaws.com/fevobelijogal/ixion_holdings_ofsted_report.pdf
    • https://s3.amazonaws.com/libosokune/42385344773.pdf
    • https://s3.amazonaws.com/gofiguj/master_treatment_plan_template.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_off0000ff3c.bin
d6977f50a8580a6009d67a00736a9059634fa8c95cdf36924168e58a7fc475bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 5120 bytes
font_01_sfnt_off000110d8.bin
896da362a64df0c916a88ca475cb1670e08f142c8c9b312e8edcd11f64e46ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110D8 10576 bytes

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