Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdfe5501685d985…

MALICIOUS

PDF

79.2 KB Created: 2021-04-01 06:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31e24df13a546a993ed22aa05eb2a929 SHA-1: 0cc06a2f5fca59029d8aa332fbb23c62f9bcf883 SHA-256: 8bdfe5501685d985fd5fc6f93957d9152c32d3e9594b57689c351b90c2e25529
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'https://botokaw.ru/123?utm_term=soundcloud+api+android', suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the ClamAV detection (Pdf.Phishing.Trojan) strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=soundcloud+api+android
    • http://tozimapowox.iblogger.org/relationship_counselling_books.pdf
    • https://static.s123-cdn-static.com/uploads/4381997/normal_5ff3e1846ea9b.pdf
    • http://zakunofukar.iblogger.org/apple_bootcamp_for_windows_10.pdf
    • https://cdn-cms.f-static.net/uploads/4402267/normal_6061656fcda5f.pdf
    • https://dibuponabax.weebly.com/uploads/1/3/4/3/134340508/xugumobizi_kuvufolu_munegunaroj.pdf
    • https://vuduzilir.weebly.com/uploads/1/3/1/8/131857383/fdd1b978994b05f.pdf
    • https://visopitolunew.weebly.com/uploads/1/3/1/4/131483219/putovemujigut_wibomuzuzez_welipaj_vufarupixina.pdf
    • https://vonojatu.weebly.com/uploads/1/3/4/7/134711894/f63919419.pdf
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/juxarejarap_pugeb.pdf
    • https://cdn.sqhk.co/kerutadit/hiH9Fgj/jaxepunanad.pdf
    • https://cdn-cms.f-static.net/uploads/4475730/normal_6010051cd0bb2.pdf
    • http://tusulanojob.22web.org/42139726865.pdf
    • https://cdn.sqhk.co/wanazofemuvu/PgcxNij/61053346057.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wokanulobasanek.epizy.com/lidufetezamalavefizapate.pdf
    • https://uploads.strikinglycdn.com/files/cd491fba-3b08-4c5a-83ad-4961e1069f53/34678572473.pdf
    • http://bolapapuziku.epizy.com/excel_vba_worksheet_function_standard_deviation.pdf
    • http://setoxevo.rf.gd/igora_royal_colour_chart_to_buy.pdf
    • http://kejidexod.epizy.com/jamixokivavipapi.pdf
    • https://uploads.strikinglycdn.com/files/fd1d8fd0-156a-410b-a65e-c03647a22631/19439687009.pdf
    • http://mosupemerumen.rf.gd/fegubiwesojaf.pdf
    • http://fajesunuk.rf.gd/bibtex_online_report.pdf
    • http://suvofaga.rf.gd/get_ielts_band_9_writing.pdf
    • https://uploads.strikinglycdn.com/files/48cb9b92-7533-494c-a486-d21e89b1ef37/86957045516.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea13.bin
1689105495d8aad8834ffa9105417cad74d733b3dd8dda79e2158ffbe2a78468		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 4676 bytes
font_01_sfnt_off0000f9e6.bin
badc2ecc62719751b66a9024fe3de573d927980d571eca16d64864103318a624		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 11168 bytes
font_02_sfnt_off00011f91.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F91 4324 bytes

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