Malicious PDF — malware analysis report

Static analysis result for SHA-256 472fe20bbf223eea…

MALICIOUS

PDF

84.0 KB Created: 2021-03-14 16:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 008f85410b0f9caf6f14fc01ebdeb3b6 SHA-1: a0232bba2c14ab3f369b3334c2c7bbcd3cb1960d SHA-256: 472fe20bbf223eeaa1f80c7c867408b7f3a9057b2038685158df79f7326320d4
126 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 an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, with a prominent one leading to 'kuzutuzo.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference a book title to entice users. No scripts were extracted, but the presence of multiple external links points to a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://kuzutuzo.ru/strik?utm_term=is+if+there+be+thorns+a+sequel+to+flowers+in+the+attic PDF link annotation
    • http://dimopun.mywebcommunity.org/64141769808.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fec79c3c75cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_602fa1bab27ba.pdfIn PDF document text
    • https://vafabifagid.weebly.com/uploads/1/3/4/5/134583570/644821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5fd9c09a77625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498986/normal_60074e853cdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_604a79f30e2ce.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/what_is_the_best_70_inch_4k_smart_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405929/normal_5fe40e02bdeb8.pdfIn PDF document text
    • https://sadusanolomu.weebly.com/uploads/1/3/4/6/134646393/zenovejup.pdfIn PDF document text
    • https://zejatuno.weebly.com/uploads/1/3/0/7/130776413/dubuzojelot.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/lady_windermeres_fan_full_movie.pdfIn PDF document text
    • http://lofoluwa.iblogger.org/epidemiologia_diabetes_mexico.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/life_fitness_elliptical_battery_replacement.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_600ce4f5224ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421468/normal_5fe16b76e49c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_602070d1554c7.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/how_to_set_sharp_atomic_clock_spc932.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvibiw.epizy.com/naregiranatoj.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/bride_svg_file_free.pdfIn PDF document text
    • http://gexovudin.rf.gd/tung_chu_lang_nghiem_tieng_phan.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/marketing_manager_resume_templates_word.pdfIn PDF document text
    • http://rewelopax.rf.gd/relazujivibesi.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/18962559450.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/nekazini.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_off00010b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B89 5264 bytes
SHA-256: b229eb3a4d78a1fe39eb4b2697caf42634140c3758d2102e77175186057f5313
font_01_sfnt_off00011d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D82 10684 bytes
SHA-256: 1fb543d31ef1fd1ad12b28bf7cb98ac68b3cac362b3d4d57eacf2da231f91d54

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