Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d3d6951931344a…

MALICIOUS

PDF

108.6 KB Created: 2021-02-20 17:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6c208160a9ddac3211ad71d07e9b25d2 SHA-1: 8e1acf128c1b04e84d2ecad533890e107745a2cc SHA-256: b3d3d6951931344a896e47da0040cdbda00f851d766c63bbeb55772284738f9d
134 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of external URIs and a heuristic for a 'download button' lure suggests the document is designed to trick users into clicking a link that likely leads to malware. The URL 'https://seumenha.ru/strik?utm_term=ti+nspire+cx+cas+ii+apps' and the linked PDF 'http://wssummer.space/667174759561yn81.pdf' are identified as key indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/strik?utm_term=ti+nspire+cx+cas+ii+apps PDF link annotation
    • http://wssummer.space/667174759561yn81.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/UjgJHxC/retro_bowling_shirts_custom.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/hcsgg2k/mods_addons_for_minecraft_pe_apk_indir.pdfIn PDF document text
    • https://cdn.sqhk.co/lazuxorus/fahe9gc/zen_pinball_fx3_cabinet_mode.pdfIn PDF document text
    • http://scoretdho.best/ambari_hd_video_songs0qeoq.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/dyhfjcZ/63909554902.pdfIn PDF document text
    • https://cdn.sqhk.co/nezotelo/Y7gdUSk/dark_raider_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_601bc78ab7823.pdfIn PDF document text
    • http://kzrovk.xyz/48089993167fdd4a.pdfIn PDF document text
    • http://zoo-taxi.site/stative_and_action_verbs_list952b0.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/1jd1qge/call_of_mini_zombies_hack_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369651/normal_5ffce1e3dae8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419001/normal_5fe9d2c150f94.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/bggjcge/92400279856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393502/normal_6002808de9d30.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/5xjcicB/wordscapes_level_8580.pdfIn PDF document text
    • http://vizionsmc.net/gopipurazedodanogqlf81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/candy_cane_wreath_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/quick_english_grammar_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/campaigner_premium_profile.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/88919904761.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/instagram_beta_dark_mode_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/p90x_schedule_calendar.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_off00016882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16882 4912 bytes
SHA-256: 7613799b9953f178ba0a04e847b73f26fb16d33b905629439cd8e420c386d002
font_01_sfnt_off0001794c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1794C 13692 bytes
SHA-256: 7b75796be84fb855a5607ce98dc27505bc5a4d32a06f23f868428f4e0065fd59

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