Malicious PDF — malware analysis report

Static analysis result for SHA-256 def0b09b533b834b…

MALICIOUS

PDF

88.4 KB Created: 2021-03-15 08:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf10395c094aa08af5167909ab53e7e4 SHA-1: 6cb718cb0d0b4b2edaa381e1d53ac63603ebccd1 SHA-256: def0b09b533b834b7120f644b6d48f1a7b268c35cab6a34a0c4012c844bef175
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to 'https://golowaki.ru/123?utm_term=keynote+template+minimal', suggesting a phishing or malware distribution attempt disguised as a template. The document body, though heavily obfuscated, contains references to 'Keynote template minimal' and the authoring application 'wkhtmltopdf', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://golowaki.ru/123?utm_term=keynote+template+minimal
    • https://static.s123-cdn-static.com/uploads/4366044/normal_5fec3ccc9996d.pdf
    • https://cdn-cms.f-static.net/uploads/4449615/normal_60263757d9a57.pdf
    • http://gosezan.22web.org/76474379733.pdf
    • https://static.s123-cdn-static.com/uploads/4388272/normal_5fe3a1f645d97.pdf
    • https://cdn-cms.f-static.net/uploads/4461211/normal_6027bc2ddf047.pdf
    • https://static.s123-cdn-static.com/uploads/4465555/normal_5fc951931a523.pdf
    • http://pumujavebedopa.iblogger.org/bajugukigopiru.pdf
    • https://cdn-cms.f-static.net/uploads/4465389/normal_601f84e977d4e.pdf
    • http://fewomazojuxed.iblogger.org/google_android_version_name_list.pdf
    • https://cdn-cms.f-static.net/uploads/4369179/normal_60131a8a9b3b1.pdf
    • https://cdn-cms.f-static.net/uploads/4486548/normal_5fd79e98df19c.pdf
    • http://wusodopepufex.66ghz.com/aves_sin_nido_personajes_caracteristicas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lurutopobi/dabivasezogiwu.pdf
    • https://s3.amazonaws.com/lorifumofelu/darar_bhojpuri_movie_video_songs_free.pdf
    • https://s3.amazonaws.com/pidufozu/abhinetri_2_movie_telugu.pdf
    • https://s3.amazonaws.com/bufipevuril/18277113671.pdf
    • https://s3.amazonaws.com/jojitagifuva/21616393185.pdf
    • http://tixaxit.epizy.com/walt_disney_world_magic_kingdom_today.pdf
    • https://s3.amazonaws.com/paxivogedewilu/jogepojuj.pdf
    • https://s3.amazonaws.com/rupatojuko/beyond_the_sea_robbie_williams.pdf
    • https://s3.amazonaws.com/batoragubukepo/wakese.pdf
    • https://s3.amazonaws.com/rimepusox/bose_soundlink_mini_1_service_manual.pdf
    • https://s3.amazonaws.com/fojaxexino/55278599107.pdf
    • https://s3.amazonaws.com/forupokisip/68714131388.pdf
    • https://s3.amazonaws.com/zazelujeju/apc_surt192xlbp_datasheet.pdf
    • https://s3.amazonaws.com/wufujudisu/free_desktop_calculator_for_windows_xp.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_off00011d43.bin
b5ee8d935b7ded831cfb3c693f5cb8b6ff2fafe47cf05ed0931332cbf03eeabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D43 4760 bytes
font_01_sfnt_off00012d71.bin
1f3bd66c9d0f64c4c2ee66a6e338b0e7ed96677d25f0d2fd0373c9640b3aff44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D71 10988 bytes

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