Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e96c81fbc28e890…

MALICIOUS

PDF

78.8 KB Created: 2021-05-05 10:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c79ac46ee891fe122d9eba5f98f1ddd SHA-1: bd922ae2e13cc7e19f01e9cf51e23b45eeb31df5 SHA-256: 0e96c81fbc28e890dcbd1b35da3e41deb0e3fad8629c28a633d0fe3c956f923a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit vulnerabilities or trick users into downloading further malware, likely disguised as a movie download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=maze+runner+the+death+cure+full+movie+in+hindi+download+1080p
    • https://cdn.sqhk.co/zidodovare/RgggcrW/follower_analyzer_for_instagram_app_download.pdf
    • http://agencymedia-ig.com/white_magic_grimoireh75tv.pdf
    • https://cdn.sqhk.co/kusewupudin/5gh7ehg/34677175971.pdf
    • https://cdn.sqhk.co/bipozipo/XOiiNhd/is_firefox_64_bit_better_than_32_bit.pdf
    • https://cdn.sqhk.co/vedimurami/KeghegO/dewokojemekevotod.pdf
    • http://smotrikino.fun/xigelidanusoguwumuby0jfa.pdf
    • https://cdn.sqhk.co/pixazizaze/idjbOcZ/wejedezokawu.pdf
    • https://cdn.sqhk.co/petebeki/VVgjDTK/towesekowajagalus.pdf
    • https://cdn.sqhk.co/penuvipaw/hb5V17w/hope_for_paws_videos.pdf
    • http://mushygushysayings.com/are_there_vegan_options_at_taco_belllea7f.pdf
    • https://cdn.sqhk.co/remonupode/ZbW4he2/malwarebytes_anti-_malware_new_version_free.pdf
    • https://cdn.sqhk.co/bomemenun/eZwiiM6/88970068774.pdf
    • https://cdn.sqhk.co/guzoladip/qYYsjcB/anonymous_chat_app.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nopomewegobij/best_whatsapp_status_in_tamil_video.pdf
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_0e92ae735bd8410e828e8c9e74037ebf.pdf?index=true
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_92ebc35c91a44868b0f724ffd284f1c5.pdf?index=true
    • https://s3.amazonaws.com/rudelazifizuvo/mapipa.pdf
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_47f8a4e30168424f833b16b43704a5a7.pdf?index=true
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_377386b3f1dd45c9ad97f973af09376f.pdf?index=true
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_8c02fd2299ed41fbb09ac8379d119bcf.pdf?index=true
    • https://s3.amazonaws.com/mesotodimus/98909551145.pdf
    • https://s3.amazonaws.com/waduzirader/ielts_academic_writing_answer_sheet.pdf
    • https://s3.amazonaws.com/xozeb/tuzisi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef23.bin
48d7bc0a5f004fe5ac7698e10710e83b5351b8904a838e20c737a78c2f1fd04a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 5812 bytes
font_01_sfnt_off000102f5.bin
fcb294bfb5d1a206d038b28a1592f5f004ad631fd7e1e8758b8d2e107592ceed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 11836 bytes

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