Malicious PDF — malware analysis report

Static analysis result for SHA-256 c95a020a5552c80d…

MALICIOUS

PDF

76.0 KB Created: 2021-02-15 04:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b1bd1a7ecde65bbeabe10d24a034ff8b SHA-1: 898ed7813a98eb0132e6c80f7809f2f45d007dda SHA-256: c95a020a5552c80d6aba36b8c5749b5f51d80bb57a8d47ee3491cccd6266310b
104 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of external URIs, including one related to 'arma 3 free utorrent', and a 'download button' heuristic suggests a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://seumenha.ru/wb?keyword=arma%203%20free%20%20utorrent PDF link annotation
    • https://cdn.sqhk.co/jezuleku/Dzwjijj/43999108065.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/ijicCia/sick_angry_math_teacher_angry_scary_school_model.pdfIn PDF document text
    • https://cdn.sqhk.co/nimotixalulo/dha5igc/68689144000.pdfIn PDF document text
    • http://bobixuposu.22web.org/bootstrap_login_form_design_free.pdfIn PDF document text
    • http://wanebori.22web.org/33356804997.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/oxford_bookworms_starter_sally_s_phone.pdfIn PDF document text
    • http://gebatuvarak.66ghz.com/26325096328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450337/normal_6002c86697461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5fd81b0797f54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481667/normal_5ff9430cdb970.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/vojapu/bugulopepapuworudezegego.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/85562768080.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/beavers_uniform_where_to_put_badges.pdfIn PDF document text
    • http://tisizewim.epizy.com/13158828845.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/56311838355.pdfIn PDF document text
    • http://zapiwolatuw.rf.gd/fuxomupemutivewugigerazap.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/search_aviation_accident_reports.pdfIn PDF document text
    • http://lifuwopokul.rf.gd/28739125957.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/bemisal_songs_pagalworld.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_off0000e7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F7 4856 bytes
SHA-256: 460b6950a487749a555c87151c22fa441dd4f37141a62732597b68c9d4324fd7
font_01_sfnt_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 14168 bytes
SHA-256: 8346423980fc8063b7d8858ed47ab9f3ca757e057bede5ed9f92634dc2a46620

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