Malicious PDF — malware analysis report

Static analysis result for SHA-256 de45cb8815d32ef6…

MALICIOUS

PDF

86.6 KB Created: 2021-02-14 08:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c1e5739688bfecc9b39e36041a68b094 SHA-1: d07aea7f7ea9f32978441ff5ec88f5845747ed7f SHA-256: de45cb8815d32ef6be25186010a1a84c5b1786f935c8c157a3570a333209d0e9
136 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, with a high-risk score. The presence of the 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to paste content into a shell, a common tactic for executing malicious commands. The embedded URL 'https://baarspo.ru/aws?utm_term=java+8+atualiza%25C3%25A7%25C3%25A3o+161' is likely part of this execution chain, potentially leading to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://baarspo.ru/aws?utm_term=java+8+atualiza%25C3%25A7%25C3%25A3o+161 PDF link annotation
    • http://look-hotel.com/architectural_record_february_2019y841i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467298/normal_60017ee93ebb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_6014606f47610.pdfIn PDF document text
    • http://buliwomof.22web.org/ishikawa_diagram_template_powerpoint.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_601608b62de3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_601c7a7b22e0d.pdfIn PDF document text
    • http://moledibatu.22web.org/how_to_remove_emulated_storage_on_android.pdfIn PDF document text
    • http://50offshop.pro/94346489806u9hw9.pdfIn PDF document text
    • http://shtampshop.ru/bme280_datasheetl0mcs.pdfIn PDF document text
    • http://grigolia-studio.ru/airac_1903_freeh26cw.pdfIn PDF document text
    • http://losqutoq.online/free_bubbles_svg_files_for_silhouette_cameo_37bayz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xaramoturowuf.rf.gd/vpn_gate_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/because_i_love_you_movie_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/ayo_e_teo_2019.pdfIn PDF document text
    • http://kikumofesokir.rf.gd/dufamujapizel.pdfIn PDF document text
    • http://tepuvat.epizy.com/ipda_debate_format.pdfIn PDF document text
    • http://mimumugemefes.epizy.com/govasototibopukazajakared.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/tipajowijibiposuz.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/creepy_crawly_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/tipesusutuf.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/egyptian_civilization_worksheet.pdfIn PDF document text
    • http://wolaniloko.epizy.com/gutipuzukexafebunuta.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 5064 bytes
SHA-256: 381baccc5f86d95f0c165a43212c3681786d3b098e03a26b41aa09a7773e96bf
font_01_sfnt_off00011369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11369 13448 bytes
SHA-256: 722cbacd2cb38b5a001ecb35c4f4ce85097d37bf7014d276b7210cd598475bb6
font_02_sfnt_off00013c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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