Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c03eada8adf7a1…

MALICIOUS

PDF

81.3 KB Created: 2021-03-20 18:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e29f8ed39ff210722a8001152f84f790 SHA-1: 96c2f775f405dba23223d0af74981391183b78cb SHA-256: 77c03eada8adf7a19d0e8b740153b640140f48ca94af24b5cb9de5eb25c4f808
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'golowaki.ru', which is likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://golowaki.ru/strik?utm_term=pit+bike+racing+engine PDF link annotation
    • http://maykistore.ru/philips_respironics_simplygo_portable_oxygen_concentrator_for_saleo0r0m.pdfIn PDF document text
    • https://cdn.sqhk.co/lunilageruvu/i2jf5jg/brotherhood_song_lyrics_video.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/mQVBZcY/lusizariporisu.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/vJjgvjf/zorenekexajabibi.pdfIn PDF document text
    • http://centerverifybadge.com/b._ed_online_form_in_jharkhand8exkc.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/3fDhdNI/89037280378.pdfIn PDF document text
    • http://clubstore.info/jetijidawsbcwd.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/mgef5jb/kufug.pdfIn PDF document text
    • http://wimebenese.getenjoyment.net/vofasifezewidi.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/gdxgfW5/final_fantasy_3_map_narshe.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/cpa6jbW/adventure_escape_murder_inn.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/46304460986.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/ij3hg0W/dialer_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/7jaZDa2/pavakonupurovar.pdfIn PDF document text
    • http://vashastrahovka24.ru/totemazaladosbtu41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/body_language_eye_contact.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/mobile_phone_number_format_china.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/30757179049.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/bristol_guided_busway_map.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/xosoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/30795373060.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/29049966203.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/sugeratudiwekagozaf.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/gate._iitm._ac._in_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/9305584400.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/breville_smart_oven_bov800xl_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 4640 bytes
SHA-256: f958749edf4a517d8f8f5cee37e9d12f8be3a6ee6cfa7812542fdb436d5a536e
font_01_sfnt_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 10844 bytes
SHA-256: 09151d965453d81f790cded555a6a026afd0144220f1e268e16c0201ec4fbdd3
font_02_sfnt_off00012919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12919 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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