Malicious PDF — malware analysis report

Static analysis result for SHA-256 189003d495ad0d8e…

MALICIOUS

PDF

84.4 KB Created: 2021-03-23 21:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 92afa14f95c98a4120a8d14b67aa109b SHA-1: 23ee16d245d3478764c56cc2734adfd75c703873 SHA-256: 189003d495ad0d8eb9e8053b5ac637a52578ed24f333d48bda4a10139b0cb3c0
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and embedded URLs, with one prominent URL being https://gimoguvi.ru/wix?keyword=essential+of+firefighting+5th+edition+study+guide+answer+key. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack to redirect users to malicious content.

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://gimoguvi.ru/wix?keyword=essential+of+firefighting+5th+edition+study+guide+answer+key PDF link annotation
    • http://nout-sale.site/rugufipufevazie3pqw.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/koduvujuf0jip.pdfIn PDF document text
    • https://cdn.sqhk.co/libudezetuv/idgjheA/9689796796.pdfIn PDF document text
    • http://priz24.site/novela_la_metamorfosis_de_franz_kafka_resumeng7orm.pdfIn PDF document text
    • http://sks-expertiza.ru/consequences_of_unrelieved_painbujbc.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/gcttZii/sotunozolotomexek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3edf08a-9816-4bd1-bb13-b16f958347e9/which_is_the_best_omron_blood_pressure_monitor_in_india.pdfIn PDF document text
    • http://sogefotatuledis.epizy.com/40180018582.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/tewatuzinemepoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/pijewijib.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/mifebalej.pdfIn PDF document text
    • http://jopidijawigedod.rf.gd/symmetry_worksheets_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92eab61e-b4d5-4186-a5ab-454a818bd62f/65070794378.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/73986382976.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/365_phonics_activities.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_off00010bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFD 5508 bytes
SHA-256: d35ae9a0e08d820c8a842dfa874e54dc33e8abf683c089c5298c9c2328a9a57a
font_01_sfnt_off00011ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED9 10976 bytes
SHA-256: bace91e8d0a2c87650490c676a3b9ae8810e950b0eb5134611e3fd68ca24c479

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