Malicious PDF — malware analysis report

Static analysis result for SHA-256 8485b20f1f73fd32…

MALICIOUS

PDF

93.4 KB Created: 2021-03-28 16:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4775e629f93bf22dcfb1556f9ddd840 SHA-1: 1969ec4a965a6e0985c36a4815334b626b024cfd SHA-256: 8485b20f1f73fd325f29ebe9e38a4b2a303da7d4434d542dd93babfc41089533
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 URL leading to a phishing site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to reference real estate forms, aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/wix?keyword=free+real+estate+buy+sell+agreement+form+montana
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fec51bc5e3d8.pdf
    • https://cdn-cms.f-static.net/uploads/4459922/normal_6041de633f072.pdf
    • http://xeresorejal.iblogger.org/1994_honda_accord_ex_engine.pdf
    • https://cdn-cms.f-static.net/uploads/4501975/normal_6023e6d44e305.pdf
    • https://cdn-cms.f-static.net/uploads/4445564/normal_602a9d71a7501.pdf
    • http://vusejulene.iblogger.org/24974311003.pdf
    • http://meblik.su/briggs__stratton_powerflow_3000_psi_2.3_gpm_gas_pressure_washeril8gs.pdf
    • http://cooldomen.space/best_grass_cutting_service_near_meu1429.pdf
    • http://awpmode.com/firehouse_subs_turkey_bacon_ranch_nutritionxw2mt.pdf
    • https://cdn-cms.f-static.net/uploads/4465018/normal_601f2d511894b.pdf
    • http://stat-index-co.com/hypertensive_urgency_managementr65f8.pdf
    • http://radanews.site/factory_reset_android_zte_model_z812ttg3i.pdf
    • https://static.s123-cdn-static.com/uploads/4470980/normal_5fc9d9d76c372.pdf
    • https://cdn-cms.f-static.net/uploads/4473890/normal_604e63aa2e28f.pdf
    • https://static.s123-cdn-static.com/uploads/4382784/normal_5ff43882ab04f.pdf
    • http://jelabenix.22web.org/66875880250.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xefiruluxom.rf.gd/diary_of_a_wimpy_kid_dog_days_full_movie_in_hindi.pdf
    • http://rowesotinik.rf.gd/free_to_word_converter_freeware.pdf
    • http://losobome.rf.gd/lovuvajubodat.pdf
    • http://fopajika.epizy.com/95006492933.pdf
    • http://lavowatovodab.rf.gd/32048371027.pdf
    • http://xutakubu.epizy.com/7967207402.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011580.bin
148d5bbecb60a55262de800b5ce51c713a5e614cbc1a5edbc3ca297f859850d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11580 5284 bytes
font_01_sfnt_off00012770.bin
0b88bc6ef74bb8f02a8a05ac339a636707bbc7b35451dfae74e8956f6f1dfd95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12770 11992 bytes
font_02_sfnt_off00015099.bin
3f83bbfb2e03141a9083badfb1da6e2b1773f9aa6b1ed8f30fc2d392a5ee3553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15099 16140 bytes

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