Malicious PDF — malware analysis report

Static analysis result for SHA-256 051dcfbdbcfd1b48…

MALICIOUS

PDF

75.6 KB Created: 2021-02-19 20:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eabb75bd6aa05a34bec139567cc928c8 SHA-1: d571cc3e83d899357e4e8af64c892df6fd731af6 SHA-256: 051dcfbdbcfd1b48b1477e33ae9a0bb16048fa881ea1817703e5a4f81fdf4756
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to URLs that appear to be part of a phishing or malware distribution scheme. The presence of embedded URLs and the ML detection strongly suggest this file is designed to redirect users to malicious content.

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://seumenha.ru/wix?keyword=adjectives+that+start+with+h+to+describe+a+person PDF link annotation
    • https://cdn.sqhk.co/lukedivibeb/hcmDjgL/76869803485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393204/normal_60214d51038e4.pdfIn PDF document text
    • http://servisvds.ru/18383368820t312z.pdfIn PDF document text
    • http://wiinorama.space/45540355721rsbpr.pdfIn PDF document text
    • http://testertumentum.space/scenario_planning_processnbd2b.pdfIn PDF document text
    • https://cdn.sqhk.co/kosadara/ehfNgc6/pure_flix_canada_price.pdfIn PDF document text
    • http://refoxedij.iblogger.org/17919770532.pdfIn PDF document text
    • http://tunulawofu.iblogger.org/40733067035.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fizaxo/blood_bowl_2_best_skills_catcher.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/sopodelala.pdfIn PDF document text
    • http://wamivofubamaxit.epizy.com/flubber_movie_worksheet_answers.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/sulasatevirexo/fipadopevuwozabapajawin.pdfIn macro / runtime command snippet
    • http://zavinawotomuvef.epizy.com/27531974618.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/lenovo_t510_battery_price.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/85739869834.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/airway_clearance_techniques.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
    • https://s3.amazonaws.com/mikibetiv/soIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 5484 bytes
SHA-256: ad380c8d8d598fcc730224a9f301f60499794d74b565173be47e6ff6ddae6972
font_01_sfnt_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 10208 bytes
SHA-256: 9839df49c31fbf313681800a7e3d0eb05bb3c589c1f5cecf4952547b6b0754ba

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