Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae2267cbf676167…

MALICIOUS

PDF

128.1 KB Created: 2021-03-24 19:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c8a35d14e2d7448a22be22f1740a2115 SHA-1: e09b1c44701fdf2b44b75c44bf8f93ee2a697f3f SHA-256: 6ae2267cbf6761678c214adc75d05adbf80f320a29125766c2497b495ab4ad40
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting and using UTM parameters, strongly suggests a phishing or link-farming attack pattern. The document body, though heavily obfuscated, contains references to remote codes and application details, potentially serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=bose+solo%252Fcinemate+universal+remote+codes PDF link annotation
    • http://gvidilon.ru/oracle_12c_sql_performance_tuning_guideodk3u.pdfIn PDF document text
    • http://fruit-citrus.space/28811135364syd87.pdfIn PDF document text
    • https://cdn.sqhk.co/bumozokal/Sje22ii/38287695020.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/ghGCtij/nombre_d_or_formule.pdfIn PDF document text
    • http://tersq.space/79854277524cdryc.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/vHihm2U/xidojivamewuku.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/hjgfrii/84070975689.pdfIn PDF document text
    • http://molopew.22web.org/25515167367.pdfIn PDF document text
    • http://wenubesirob.22web.org/57745174616.pdfIn PDF document text
    • http://fixadazopirutus.22web.org/direito_penal_cesar_bitencourt_parte_geral.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/orhglwC/7521839625.pdfIn PDF document text
    • https://cdn.sqhk.co/wasuxuletiz/q3heugh/24622647935.pdfIn PDF document text
    • http://uorott.com/wrath_of_zombies_gameplayycjy6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wetoxikilosawa.epizy.com/journal_ennahar_2018.pdfIn PDF document text
    • http://mibavened.rf.gd/what_is_the_next_book_series_after_percy_jackson.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/lopinokevutokifotezu.pdfIn PDF document text
    • http://webuguvafu.rf.gd/75428659489.pdfIn PDF document text
    • http://norilonabu.epizy.com/welilapalonofilamawirexex.pdfIn PDF document text
    • http://lajuloverebob.epizy.com/balupu_hd_video_songs_1080p_free.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B85D 5228 bytes
SHA-256: 437a2299e9fa49c7cc45a1a5389a73a0310254adcdf2afd75bc7b60f8cadb885
font_01_sfnt_off0001ca1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA1C 11808 bytes
SHA-256: bf47dd2a07d38640c1b0e30ac31b22ce684c5f7760b367c0742677f14f6afc90

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