Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb3517e1103d0c0…

MALICIOUS

PDF

71.5 KB Created: 2021-03-02 20:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f5af4a7ca25178e6f9061a8119633051 SHA-1: 2aca681535030918d4b7ee42038616f796fb45d2 SHA-256: 5cb3517e1103d0c0a7817fef6d027908cdae5f13312db628465188737b26b59c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/award?keyword=d%2526d+5th+ed+adventure+league PDF link annotation
    • https://cdn.sqhk.co/sisadenev/LijiOgc/49590631704.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/Nifbgge/pastel_tie_dye_hoodie_diy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449990/normal_5fdf944c21f7d.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/d7BgimF/guide_for_free_fire_tips_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://budokukikaririd.rf.gd/75604419773.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/monulegusejodobibanex.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/cv_template_en_gratis_word.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/arabian_adventure_1979_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/norton_antivirus_free_with_product_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/convert_to_word_using_ocr.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/fifo_or_weighted_average_cost_flow_assumption.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/segofemogiwitezotux.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/pretty_format_xml_in_notepad.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/1019963415.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/bloody_mary_picture.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/classic_wow_leveling_guide_undead_priest.pdfIn PDF document text
    • http://vipezexazagi.epizy.com/loluminemitazolibiv.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_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 4156 bytes
SHA-256: 5ae3bcc49c87f96444fbe3d11ff27db43b6aea299416b9f3d286273c64098da8
font_01_sfnt_off0000eec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 10280 bytes
SHA-256: a63f389bcfc120fa40a62277497b0e5259bc2a6c2a1c61feb3ff11d365abc77e

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