Malicious PDF — malware analysis report

Static analysis result for SHA-256 654c7452b8483c81…

MALICIOUS

PDF

67.9 KB Created: 2021-01-11 00:26:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79bb8431f07c52f4459fa6e34dbc3f08 SHA-1: db2957729a6aa96fa6cfb4cd835f33b31ba2941c SHA-256: 654c7452b8483c81f854c1567f4d38232add6c6f0c5e10ae5de157a799ac502e
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=massage+envy+greenville+sc+verdae
    • https://cdn.sqhk.co/fujalapevame/bAibhef/weather_gone_viral_tv_series.pdf
    • https://static.s123-cdn-static.com/uploads/4382958/normal_5ff256c13b165.pdf
    • https://site-1171847.mozfiles.com/files/1171847/basiwemunewebutazoradox.pdf
    • https://cdn.sqhk.co/kavesake/jdISBtd/elearning_ngo_i_ng_hu.pdf
    • https://static.s123-cdn-static.com/uploads/4478393/normal_5fc86dc6a0d65.pdf
    • https://static.s123-cdn-static.com/uploads/4444371/normal_5fe2e61033448.pdf
    • https://site-1168410.mozfiles.com/files/1168410/shogun_assassin_english_subtitles_watch_online.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xezujuxoz/lionheart_legacy_of_the_crusader_guide.pdf
    • https://s3.amazonaws.com/fosalizuzu/89514357159.pdf
    • https://s3.amazonaws.com/takurugilij/sovomitoverezusojepopuge.pdf
    • https://s3.amazonaws.com/poguvelefa/4k_wallpaper_android_app.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_off0000ce12.bin
3e65276cdea595ebca16f31b306e7b737bb23e4e9b5632a48b375f6079a7520f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE12 5272 bytes
font_01_sfnt_off0000e025.bin
661f2591753df43cf0ca874e995d524fbf500303d448556cd1f3534f55757dbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE025 10100 bytes

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