Malicious PDF — malware analysis report

Static analysis result for SHA-256 525c0f43fe587039…

MALICIOUS

PDF

122.7 KB Created: 2021-02-18 04:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2948f6a5a3e612670c2beffb33f34c04 SHA-1: 21831f2322d403deee164614c9cdc5201ec55251 SHA-256: 525c0f43fe587039679e5e768873167e614d122b660f65c3d9f2cf3f3efe3a94
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bologen.ru/wix?keyword=nypl+tech+connect+office+readiness+series PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459464/normal_60275f5a45ff7.pdfIn PDF document text
    • http://everydayy.fun/ken_libbrechts_field_guide_to_snowflakes2c77u.pdfIn PDF document text
    • http://kofoxulemaxabur.22web.org/blanchard_macroeconomics_7th_edition_free.pdfIn PDF document text
    • http://septiki-rf.website/best_english_speaking_booko0f57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473902/normal_5ff15a188add3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402481/normal_5fc9e9af54f68.pdfIn PDF document text
    • http://artyom.guru/sewunujajumuxodetufigik3ki1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kawojimulogizef.rf.gd/chromogenic_coliform_agar_cca_oxoid.pdfIn PDF document text
    • http://banodinetawapi.rf.gd/beach_buggy_racing_mod_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/61325855761.pdfIn PDF document text
    • http://mibofive.epizy.com/countif_not_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/rujawuvuzevatax.pdfIn PDF document text
    • http://warepeg.rf.gd/visual_studio_2012_platform_toolset.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/73142638730.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/the_curfewed_night.pdfIn PDF document text
    • http://tevuxut.rf.gd/nationwide_retirement_loan_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/mt_san_gorgonio_snow_report.pdfIn PDF document text
    • http://delomubabobuzu.epizy.com/fujigulit.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_off0001a609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A609 5316 bytes
SHA-256: 304430c58e224bbe3e0a8fc400f112e6c2999306ac39d513c9ee7eacbfb9f984
font_01_sfnt_off0001b828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B828 10876 bytes
SHA-256: 722c9b8b22e80e38c406211461a7cc6dfc1be6d725dcd110e2c088eb4d0fe8ec