Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b9ae310a385483…

MALICIOUS

PDF

83.0 KB Created: 2021-03-31 10:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fcd0a2aa2f011fd4e5b2875ce8e036d SHA-1: 219a60e0203fcd6a5eea598220a5589107816968 SHA-256: 84b9ae310a385483de0f0fb0477cd1d31cffc328f155c8653917bdb7fe00172b
96 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. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to 'Ecological economics herman daly pdf'.

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://maypoin.ru/award?keyword=ecological+economics+herman+daly+pdf
    • https://cdn.sqhk.co/woxiwokujuwe/yggmibM/90328215882.pdf
    • https://cdn-cms.f-static.net/uploads/4368955/normal_60335a126eca9.pdf
    • http://idealicaitaly.site/geometry_formulas_tablef601j.pdf
    • http://pc-remont.website/new_naats_2019_audiox0uso.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://cdn.sqhk.co/latosagax/vRtRKhj/vajef.pdf
    • http://begipeg.iblogger.org/format_bootable_usb_ubuntu.pdf
    • https://cdn-cms.f-static.net/uploads/4409239/normal_601f11f31dac4.pdf
    • https://cdn.sqhk.co/solumapidema/Higju0D/50210650405.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf3eff66-0928-44ec-bed2-913bb5d61146/best_alarm_clock_with_bluetooth.pdf
    • https://uploads.strikinglycdn.com/files/22ba66c0-ec71-46eb-837a-ddeefaf546c5/how_to_record_installment_sale_in_accounting.pdf
    • http://dizavinizekabos.rf.gd/tedanatikejudixega.pdf
    • https://uploads.strikinglycdn.com/files/b02cae70-c689-4d8a-b059-309c933585b5/gekimekojuluwo.pdf
    • http://gugujis.epizy.com/plant_high_school_football_schedule_2020.pdf
    • https://uploads.strikinglycdn.com/files/15c05482-0148-487d-87ed-37c249321c72/wagiwixum.pdf
    • http://jatuxijor.epizy.com/mesasonimub.pdf
    • https://uploads.strikinglycdn.com/files/b2faeeff-701c-4d7a-9083-b4f99f54957a/demostrar_identidades_trigonometricas_ejercicios.pdf
    • https://uploads.strikinglycdn.com/files/262f6ad2-5401-4948-9b93-c90413f276b8/91289443165.pdf
    • https://uploads.strikinglycdn.com/files/59e21f71-2cea-435a-9b2c-88676a8a1db9/php_convert_html_to_text_plain.pdf
    • https://uploads.strikinglycdn.com/files/450e59e7-7135-4929-be82-e53191160c2f/xizegedulamip.pdf
    • 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_off000105b3.bin
bc2ac4f0f9f7951ad9bd7738b55a191d6716af4a0e736870568e1c7ea0c9fa42
pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 5628 bytes
font_01_sfnt_off000118b9.bin
df623f660506868eb817f42faedb36304a0ded92d5fd738ddab54edb7e4c87fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x118B9 11128 bytes