Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ceb45e75b8de5c…

MALICIOUS

PDF

81.7 KB Created: 2021-03-18 00:20:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ab8bb256bc1c2d3a479bf2510d0a42e SHA-1: 74dc239fac9a84911977e96de74e717ffd937551 SHA-256: 37ceb45e75b8de5c1254406172be156f744fe136c6495c4460a6378b38a7cd9f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to a book summary. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/aws?utm_term=the+great+gilly+hopkins+summary+chapter+9
    • http://nesibobivugo.iblogger.org/sesam.pdf
    • http://rixanemusijod.mywebcommunity.org/cost_accounting_variance_formulas.pdf
    • http://mafonofolifeda.22web.org/visan.pdf
    • http://duwudivusupo.mygamesonline.org/whirlpool_front_load_washer_error_codes_e3_f8.pdf
    • http://tozepimituxagus.iblogger.org/coldwell_banker_logo.pdf
    • http://tapodozinojet.mypressonline.com/agile_it_organisation_design.pdf
    • https://cdn.sqhk.co/sobekalob/Setryhe/55676844577.pdf
    • https://cdn.sqhk.co/xesozugis/cighcJv/27921597453.pdf
    • https://cdn.sqhk.co/gujipiror/jjhe8jc/matchington_mansion_cheats_level_911.pdf
    • https://cdn.sqhk.co/mujawiru/dwk5jfX/t_mobile_phones_walmart_family_plan.pdf
    • https://cdn.sqhk.co/bidogefapo/RhghcI5/kibowovowelagufukubi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lowuwofuxali/bbmp_project_full_form.pdf
    • https://ce3a146a-d504-4efb-981c-4593fb85d965.filesusr.com/ugd/5b5da7_4cf904e5514040c28e0a340d154d72c7.pdf?index=true
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_a7b3dc9778ee479da6d968b05b40c630.pdf?index=true
    • https://s3.amazonaws.com/ginutu/17771461255.pdf
    • https://s3.amazonaws.com/kujesulad/lenen.pdf
    • http://varewokumozikon.rf.gd/smart_bulb_security_camera_price_in_india.pdf
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_7874a2c49bdd453ebcc1e075ed9495fa.pdf?index=true
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_c30500b3fe264e94a7ce90c0862d2299.pdf?index=true
    • https://s3.amazonaws.com/zalisujezajaje/bodoni_mt_poster_compressed_font.pdf
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_c2faa7342fd949c18c3745a6942d497d.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffdb.bin
06b9b27599c7852cee6f181d172110dd7046d4c99503ffaf47542a68d851f470		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 5620 bytes
font_01_sfnt_off000112db.bin
78bd194477efb2f8eb131df130ab170a091af2bba3bf6aab5ec0c5e373bff086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112DB 10824 bytes

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