Malicious PDF — malware analysis report

Static analysis result for SHA-256 719a8391bc5aaf69…

MALICIOUS

PDF

80.9 KB Created: 2021-04-08 21:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c15d21c742f12bd9ed88cd085e9ad537 SHA-1: edfbe3f2c380e9716770e5b3fb9a2ef8f3743898 SHA-256: 719a8391bc5aaf69a3c6e07324c8094c21fbabf70a645e338f75bf295a946876
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=how+to+print+trimble+business+center PDF link annotation
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/mazukod.pdfIn PDF document text
    • http://help-verification.com/a_series_of_unfortunate_events_season_3_episode_6u26sp.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/what_are_knowledge_management_processes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_60149db11ad49.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/speed_learning_cartomancy_fortune_telling_with_playing_cards.pdfIn PDF document text
    • https://detitominaxa.weebly.com/uploads/1/3/5/3/135304018/35340e79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_606b1791d210b.pdfIn PDF document text
    • http://lovechat24.club/best_free_sound_enhancer_app_for_android5f0a7.pdfIn PDF document text
    • http://topstop.site/vulanadaxe4rpfl.pdfIn PDF document text
    • http://politach.com/total_war_shogun_2_download_crackf4ebx.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/12749664453.pdfIn PDF document text
    • https://nozusetemakofam.weebly.com/uploads/1/3/1/4/131408546/xanimamujiwajiz.pdfIn PDF document text
    • http://spiritstudio.ru/77964108788p1wvs.pdfIn PDF document text
    • http://itchia.space/aprender_a_leer_las_cartas_espaolas0gqv9.pdfIn PDF document text
    • http://liolika-rsya.ru/736821780701cf74.pdfIn PDF document text
    • https://woxoxuwavi.weebly.com/uploads/1/3/4/6/134689382/6dfa59b35548.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://bemawupi.weebly.com/uploads/1/3/0/7/130740003/1380608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xotopusedewix.myartsonline.com/how_to_write_a_treasurers_report_for_agm.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/vutajopaxef.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/jesofebu.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/22813249917.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_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 5064 bytes
SHA-256: 04bd9cbea39c15c5f5e94ca3c2be1f90b1a5fcd7d40b845628c89e213b80840b
font_01_sfnt_off0001117c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117C 10692 bytes
SHA-256: 057e4d38066b144407e00cd3910eaa3c1ec262d25bd84e05e9dfdf0d85212b81

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