Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f24057c6617428a…

MALICIOUS

PDF

71.7 KB Created: 2021-03-09 22:23:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ab2ba8762dfbe9bf5a2cd011d13b1044 SHA-1: 1b7f335c8f6f0edf2e4bdbb612d5b4cc60d93a06 SHA-256: 5f24057c6617428a70dbfb398be1ca1e8b3d746b7c71628ff26c78faf75b4c77
134 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 a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/wix?keyword=movie+download+sites PDF link annotation
    • https://cdn.sqhk.co/jowapezo/Djdfbqg/photo_pattern_lock_screen_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/Rqiiieg/goxagovajuzosofusemebuk.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/avhfrqK/knives_crash_mod_apk_1._0._16_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/ihhjbic/98402779472.pdfIn PDF document text
    • http://todayshop.website/xefexojowanolexodutef9sdz.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/lib0thh/94505193535.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/jjijeJG/auto_theft_gangster_download_free.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/blue_bossa_chords_bb.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/4ieTj0h/olvidarte_nunca_karaoke.pdfIn PDF document text
    • http://firstreadersclub.com/107474446887g7pw.pdfIn PDF document text
    • http://hookup671.site/bivagufajufvl6f0.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwipem/IZgeVib/11507679890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387581/normal_6006ae7368872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501374/normal_6026951546af6.pdfIn PDF document text
    • http://misstourist.info/titanic_music_sheet_recorder4xkbj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowofiz.myartsonline.com/16733604846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9593e3-26ab-42b5-a382-3f669bfc663b/3754266895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845ac7ea-51fa-4530-9a1e-d8970ff07a83/kuzopimajakonifufexeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b6c70f-3271-4c10-aa23-7afeaaf8463a/evaluating_messages_and_images_of_different_types_of_text_reflecting_different_cultures_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/718d587e-6bce-4d2b-9f84-5e33755de0a9/vulipuvasififowog.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_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 4880 bytes
SHA-256: 77d0763925f8ee5c0050821076297d97c27f648ac3fe02c6d58954cf747e37f3
font_01_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 10184 bytes
SHA-256: 59179114fae98189e611e0a86e38910d19f5920d707e5e2cc2fcc727aabbef52

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