Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e89c025061951ee…

MALICIOUS

PDF

70.0 KB Created: 2021-06-11 04:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1a791ccdc5fefb9df4e2a9856e8fc962 SHA-1: 3f1e4c14ed9fdd4d58d88139fa50f4b9056585f9 SHA-256: 9e89c025061951ee9d1e514a4a95c300eb03bd2e9454b558fe638605bec70d04
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a prominent one leading to 'archism.ru' disguised as a game download. Heuristics indicate this is a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://archism.ru/pbw?utm_term=five+nights+in+anime+mobile+download PDF link annotation
    • https://kabatinamipe.weebly.com/uploads/1/3/4/6/134636342/e786987b.pdfIn PDF document text
    • https://jutonigozazizeg.weebly.com/uploads/1/3/4/7/134700746/xuxagijut.pdfIn PDF document text
    • https://siveruvamavekug.weebly.com/uploads/1/3/4/2/134266289/9454d7a43d01cc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negovijalulu.pbworks.com/f/33720231370.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/w/file/fetch/144495300/how_to_set_time_on_timex_indiglo_expedition_watch.pdfIn PDF document text
    • http://nodisakajew.pbworks.com/f/safororakowapo.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/f/47520945405.pdfIn PDF document text
    • http://bekojifutok.pbworks.com/f/17575562624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd8265a-d1c0-4614-bcab-a3f479ba9e1b/gumobipipugizu.pdfIn PDF document text
    • http://xixokuzujoz.pbworks.com/w/file/fetch/144569070/pandillas_guerra_y_paz_primera_temporada_capitulo_31.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/w/file/fetch/144873621/23862142855.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/w/file/fetch/145011801/photo_recovery_app_download_for_android.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424212/82006588735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee0c88c-df2b-4c13-b3a1-0eb508242e51/faxibejuwi.pdfIn PDF document text
    • http://xemeganavon.pbworks.com/w/file/fetch/144776142/indian_creek_black_diamond_strike_20_gauge.pdfIn PDF document text
    • http://wudiwiligis.pbworks.com/w/file/fetch/144576426/how_to_get_amazon_flex_app.pdfIn PDF document text
    • http://nijominem.pbworks.com/f/american_pie_reunion_full_movie_download_dual_audio_480p.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/engineering_drawing_multiple_choice_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6891c610-9c00-4f6b-9690-7d8c7cf47877/62300621095.pdfIn PDF document text
    • http://zuxanuj.pbworks.com/f/critical_strike_cs_counter_terrorist_online_fps_mod_apk_download.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/f/does_razer_core_x_work_with_any_laptop.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/movezezabu.pdfIn PDF document text
    • http://dazokarodu.pbworks.com/w/file/fetch/145100679/xunabaxexufofifetaxalax.pdfIn PDF document text
    • http://fifekapem.pbworks.com/w/file/fetch/145063422/jorugebijinetigebur.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_off0000d325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD325 5392 bytes
SHA-256: 51dacba4d0c1bb2f9c8392f1c3cde1399ef8bd39c096d4b3768f1fb4eccc3f5d
font_01_sfnt_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 10760 bytes
SHA-256: 8c3040d051d5cc2bf200d9c2fc534c984c8805f500af12a1433c4add7a319368