Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc5bb7e5a4e02fc…

MALICIOUS

PDF

67.6 KB Created: 2021-02-26 19:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fda2889b5f5f8eb8a42e22d2336ac73b SHA-1: 544996adf3bca5cf52646b499ea97d7414ae1c18 SHA-256: 4dc5bb7e5a4e02fc5f36d2649f09474d92010c0916b9a9ff2fb4f68399f7febf
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://nipisod.ru/strik?utm_term=round+wood+top+end+table+with+metal+legs', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to product listings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=round+wood+top+end+table+with+metal+legs PDF link annotation
    • https://cdn.sqhk.co/waxipefimafa/1DCHLdO/oregon_ducks_football_schedule_for_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/licSjal/79441089980.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/ibVkehj/sunshine_house_aiken_sc.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/V3jgZie/27511086031.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/gcjgUjb/horizon_talk_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/dLiejdX/university_of_miami_law_school_tuition_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/FQjjhgT/diversity_equity_and_inclusion.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/jhje1Fu/prime_video_android_tv_apk_4._8._69.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/Jjf2OrV/asteroid_coming_close_to_earth_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/fGjcCo2/38130683258.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/jexijer/56845864387.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/math_fraction_addition_and_subtraction_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/circuit_breaker_abb.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/majogatomazabawew.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/tobid.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/pifunajowagigugez.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/dfbguide_face_reveal.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/f-_stecker_richtig_montieren.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/27105451511.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_off0000ca53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA53 5516 bytes
SHA-256: 35ed0364557641ce065e28186e3b0609ec28fd0ac1410b63d13b207eb7310a10
font_01_sfnt_off0000dcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFC 10264 bytes
SHA-256: e189c3a42b9d4ca04f0bc299cda271e7f6a2160a160d0c3b45af3c056e57abe0

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