Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87b490f42fb851e…

MALICIOUS

PDF

78.9 KB Created: 2021-05-18 23:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c77be921c138349b3dc91d19c748c33d SHA-1: 70e6de236f50988689eefe381185b0956037b9cb SHA-256: f87b490f42fb851ece60af2923183ee01834b5f7c6ad6d4f57802465a3fcd721
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=direct+and+indirect+speech+exercises+for+class+7+icse+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485313/normal_603035f010927.pdfIn PDF document text
    • http://wagisate.22web.org/rojemovesuravetugudumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_60203911beada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_6067c2b21c00e.pdfIn PDF document text
    • http://pasasem.iblogger.org/kedoxamozatetag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_601e03f90bdf1.pdfIn PDF document text
    • http://fibubomalinod.22web.org/ts_academic_calendar_2020_20_download.pdfIn PDF document text
    • http://sokuxutiralibi.22web.org/affinity_designer_ipad_manual.pdfIn PDF document text
    • http://jifanavigizan.iblogger.org/60618667356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404757/normal_5feaefebb27c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jomeruwiw.epizy.com/rurizigulowizimiwewatige.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/cost_of_sub_zero_compressor.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/lawn_boy_10323_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/share_chat_attitude_status_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/gorelal_barman_cg_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/doodle_god_answers_survivor.pdfIn PDF document text
    • http://nizoduni.rf.gd/55203169221.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/how_much_do_cessna_150_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/82755019649.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/questes_de_analise_combinatoria_resolvidas.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/saira_narasimha_reddy_audio_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/biology_textbook_class_11_ncert.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/calculus_bc_2010_free_response_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/best_army_mission_games_for_android.pdfIn PDF document text
    • http://jikusona.rf.gd/lirebenefumasor.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/pusinozojomiwuwelugufowe.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_off0000f55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 5484 bytes
SHA-256: 6d33dce7c1746c19b6f3e0b4e8fc6489059662e8bd8fdfaf9a7f9b50aeb04021
font_01_sfnt_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 10884 bytes
SHA-256: b3d4606fa07b0ed44323dc69d5ab01f1fb7c36a18892906ad01f64d9fd84bf30

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