Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3de8c66369ccff…

MALICIOUS

PDF

73.9 KB Created: 2021-03-21 03:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b57c9d849d4e7d441657a54880a8dd8f SHA-1: 713eb64a471b7706976fbadac2ca1fc601f541d4 SHA-256: 4a3de8c66369ccff67581b8dac9586807a62a272f71c5d78f2c64432634cbe65
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'bail bonds manhattan', suggesting a lure for that specific service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=bail+bonds+manhattan
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcef70670a53.pdf
    • https://cdn-cms.f-static.net/uploads/4449014/normal_5fdb3481377ec.pdf
    • https://static.s123-cdn-static.com/uploads/4392649/normal_5ff151589b1e9.pdf
    • http://granitmetrospecstroy.ru/55456512635xgb75.pdf
    • https://cdn-cms.f-static.net/uploads/4497358/normal_60293f234ff7c.pdf
    • https://cdn-cms.f-static.net/uploads/4490523/normal_60567ce33ace7.pdf
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fd1e1f2627e8.pdf
    • http://wildber.store/line_graph_worksheetpmon3.pdf
    • https://static.s123-cdn-static.com/uploads/4381085/normal_60081d98cf3bc.pdf
    • https://static.s123-cdn-static.com/uploads/4393889/normal_5fcd79d98e8b8.pdf
    • https://cdn-cms.f-static.net/uploads/4380383/normal_602dae4a7a734.pdf
    • https://cdn-cms.f-static.net/uploads/4446401/normal_603581eb54aca.pdf
    • http://test123test.xyz/how_do_i_clean_my_ge_dishwasher_filter70s6d.pdf
    • https://cdn-cms.f-static.net/uploads/4374978/normal_603a89d75846c.pdf
    • https://static.s123-cdn-static.com/uploads/4366397/normal_5ffcabb1d3334.pdf
    • https://static.s123-cdn-static.com/uploads/4388827/normal_5ff9301a9d0af.pdf
    • https://static.s123-cdn-static.com/uploads/4407729/normal_5fcace08e7983.pdf
    • http://sysfix.ru/whats_an_artist_statementqw5ek.pdf
    • http://autocredit.moscow/wigatemuneloaa52z.pdf
    • http://tehnikator.ru/bmw_e30_bentley_service_manualz7odt.pdf
    • http://1offpark.xyz/belkin_router_factory_reset_password2pz2c.pdf
    • http://prizinsta24.site/warcraft_2_movie_hindi_dubbed_watch_onlinekieu5.pdf
    • http://evakuator-uga.ru/movie_free_tamiluko9v.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e58c.bin
380dd6c52edc1bb8d080c48604ce2049fe0a6f3e91924d76d162570f3084e42f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 5156 bytes
font_01_sfnt_off0000f6e4.bin
d9e4a11fc5fcff1757492226eca7fa2682c44c13997e9ea35e934cfa3cb818d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 10428 bytes