Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d761dfc1621f7b…

MALICIOUS

PDF

73.8 KB Created: 2021-02-26 01:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5b637bcba5e13d5772e23478653f9049 SHA-1: dbba47f8d61656a621e5f3754e499f0a9f074cb2 SHA-256: f0d761dfc1621f7b56e9bbfb73247fc77319c7e43ed9949a6d37db5207c3ea2f
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating it's a phishing or trojan PDF. The embedded URL and document body suggest a lure related to downloading software, likely to trick users into downloading a malicious payload. No scripts were extracted, but the PDF structure and external URL are strong indicators of a phishing attempt.

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://baarspo.ru/strik?utm_term=convert+jpg+images+to+pdf+software+free+download PDF link annotation
    • https://cdn.sqhk.co/vozaxodep/ehj5uMO/99448281139.pdfIn PDF document text
    • https://cdn.sqhk.co/gurukemopuge/ImigzLb/gigokaled.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/yCxrUia/xarifexuwuzafewozizewib.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/dhdkdhc/11981195048.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/P7ihier/park_management_job_description.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_60382e8a1046c.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/hijjijB/bezakodumevopevoloso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450889/normal_601afee5e7f03.pdfIn PDF document text
    • https://cdn.sqhk.co/vumatoxikom/iOighbm/t-_mobile_syncup_drive_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gepaxulunan/0tGljjz/global_citizen_festival_2016_nyc_lineup.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/jj5jghd/best_vanilla_cake_recipe_without_cake_flour.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_6034c03707f29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445749/normal_5ff809031281d.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/Ohcieij/36579814643.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxiruvud.myartsonline.com/how_big_is_30_by_40_inches_in_feet.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_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 5492 bytes
SHA-256: b1e5c6d95a658c79cb635dbd079e0660934ad77be37b119640d811043534426a
font_01_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 10404 bytes
SHA-256: ed9c8305498983a83f165e473e7d7d5b9345fb6795b76b891fc889eff20cddc0

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