Malicious PDF — malware analysis report

Static analysis result for SHA-256 6391e8aced0b6e07…

MALICIOUS

PDF

79.7 KB Created: 2021-03-25 04:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 216f7a28d3c5cf55c90060c656960392 SHA-1: 2e73db93496b875906795ea4ed9fe3085cb1c4ea SHA-256: 6391e8aced0b6e07778882cdf1ca13cafe0d734be30c29ddb3080e7fbc3edd34
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://xezojetit.ru/123?utm_term=libro+aprendizajes+clave+primer+grado+pdf', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to educational materials.

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://xezojetit.ru/123?utm_term=libro+aprendizajes+clave+primer+grado+pdf
    • http://vibipigida.22web.org/troy_bilt_customer_service_phone_number_usa.pdf
    • http://xobazosapiru.22web.org/classical_mythology_8th_edition.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://peporedamef.epizy.com/whistler_bike_park_trail_map.pdf
    • https://s3.amazonaws.com/fasudikek/jolodefirekodipife.pdf
    • https://uploads.strikinglycdn.com/files/1bd44159-ff1f-41d8-be55-83ee30bcac8b/74742561648.pdf
    • https://uploads.strikinglycdn.com/files/7c7ff2b5-d05e-4c60-8df5-abd87500b5b7/demofojugosu.pdf
    • http://sakikuzugodo.rf.gd/ambedkar_books_in_telugu_free_download.pdf
    • https://uploads.strikinglycdn.com/files/a81e394c-c651-420a-81cf-76ada1766079/vogejopovefazezadez.pdf
    • http://merekum.rf.gd/batman_arkham_asylum_utorrent_pc.pdf
    • https://s3.amazonaws.com/tesodagiwor/clarinet_jazz_sheet_music.pdf
    • https://s3.amazonaws.com/puretulenuza/kanonepojajiw.pdf
    • http://wetizizokixo.epizy.com/common_core_worksheets_dividing_fractions_word_problems.pdf
    • https://uploads.strikinglycdn.com/files/d1245ab8-de62-4807-bfff-f377280752ac/everstart_jump_starter.pdf
    • https://uploads.strikinglycdn.com/files/068d0d87-3c85-47d6-9681-e699e95800cf/30086814074.pdf
    • https://s3.amazonaws.com/dogazisuze/65071078720.pdf
    • http://wotiputega.epizy.com/69555517695.pdf
    • https://s3.amazonaws.com/bogeguva/78899066106.pdf
    • http://webimonok.epizy.com/16849090054.pdf
    • https://uploads.strikinglycdn.com/files/1605fabb-2f1c-4d1e-b4b8-8ce55fcf32c4/element_roku_tv_remote_wont_work.pdf
    • https://uploads.strikinglycdn.com/files/d10133f0-321d-4929-9dad-e1f8d6d9a452/us_fda_food_safety_guidelines.pdf
    • https://cdn.footystats.org/
    • 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_off0000f8fe.bin
613197f82927a218a731df8e08bbb91c96f82d2565064c523cdc806b0a50e37a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 5744 bytes
font_01_sfnt_off00010c8f.bin
31ea75c91cfcc201a6532f3ca4a50b89fa21a3b98757b30d065d51f31648b01a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8F 10836 bytes