Malicious PDF — malware analysis report

Static analysis result for SHA-256 972c7142609305fd…

MALICIOUS

PDF

82.8 KB Created: 2021-02-24 17:26:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 02137ed048de69e723decfd4610a622d SHA-1: f2d7765d9e0334c77d0dea4b02d002c204f2cf05 SHA-256: 972c7142609305fde78320a7500b46cf327b9574cd847477dfbc31014423d406
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure the user to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=cirque+du+freak+film+review In PDF document text
    • https://cdn.sqhk.co/jimumakevaji/hiyjcjb/75199208728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_6009cf7626ec1.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/vinland_saga_volume_12_release_date.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418013/normal_5ff509485aeb8.pdfIn PDF document text
    • http://tidedejix.iblogger.org/81617543284.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/djgIwje/wwe_rock_ringtone_mp3_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_600a144229977.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/Pieiggg/50_games_like_dark_souls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407304/normal_5fd65f27f2f61.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/44771294117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460723/normal_5fc991535ccee.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/holmes_and_rahe_stress_scale_calculator.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/fifty_shades_freed_movie_where_to_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/ejjgigc/valhalla_viking_heaven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fe65edad00e2.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/hfzgx54/men_s_nike_windrunner_jacket_sale.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/jevelel/stock_market_analysis_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/vefuwaja.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/xofuriluzobuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/revoxuw.pdfIn PDF document text
    • http://novuzebires.rf.gd/how_to_find_position_based_on_velocity_time_graph.pdfIn PDF document text
    • http://zemigubu.epizy.com/widusebijibasapugimexoku.pdfIn PDF document text
    • http://gulogomolu.rf.gd/tubexeferonutan.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_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 5120 bytes
SHA-256: 43b690fc999a2a66be5f1fc3e85ec7cf5363583dfd6150111cf6c092759bde96
font_01_sfnt_off0001181c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 10944 bytes
SHA-256: 2185d4700f2c749dbcee51da1a7a388cdf3201140f76ee72d772abaa55cd8def

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