Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ae3bf45fe5aa28…

MALICIOUS

PDF

74.4 KB Created: 2021-03-01 15:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 36b29ffa70aab6cfa27e35407dd6fd3c SHA-1: 56e1a164e3c8edd53214a7d1d7cce9e2379cc32f SHA-256: 21ae3bf45fe5aa28636741dc3bf11cd91026f07ff6d983bce374d09ade39e90b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that is likely hosting a malicious payload, disguised as an ebook. The document body, though heavily obfuscated, suggests a lure related to technical drawings, aligning with the phishing nature of the URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://vilenefex.ru/123?utm_term=technical+drawing+with+engineering+graphics+15th+edition+ebook PDF link annotation
    • https://cdn.sqhk.co/nipumusawobo/eiaCmuZ/hip_hop_producer_pads_apk.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/84339554210.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/itFgeig/dibasic_calcium_phosphate_dihydrate_bp_monograph.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/ejjmic5/19249439445.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/35986171299.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/iggdKqR/gudumekasarebuxanejiwowix.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/oedipus_rex_full_text_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/fF8hjiH/vevuwedezeveti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384642/normal_6003d64fce935.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/are_all_panasonic_dect_phones_compatible.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/6789576623.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/85591045009.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/phantom_of_the_opera_songs_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/37475834046.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/9329044188.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/ifrs_off_balance_sheet_accounting.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/27778245490.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/samarasimha_reddy_movie_audio_naa_songs.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_off0000e3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CA 5756 bytes
SHA-256: 175d8d3e1428563ac10bb394f7d22b39272639bf79172175a5373a3a3f0954c2
font_01_sfnt_off0000f775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF775 10640 bytes
SHA-256: b3d6483f145e7d25007894a2d6b9d9f35a8549b25bd039f93bc4c84e9caa1af1

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