Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e80b72fcd80782…

MALICIOUS

PDF

76.3 KB Created: 2021-03-29 05:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e036173c09a9fa534a1f669659de228 SHA-1: e3a693752e44355f5b40a18a4ccb1e47cfdb2e6b SHA-256: a9e80b72fcd8078274d4a20272a7cdaceb1a5fd22ad7437c43b75da637311cf7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading modified game applications. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=download+dragon+city+mod+apk+unlimited+everything
    • https://static.s123-cdn-static.com/uploads/4390350/normal_5fde0a51d8764.pdf
    • http://jelolizabuvixi.22web.org/dofus_huppermage_beginner_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5fd236bb53a88.pdf
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5ffd7a34908a2.pdf
    • http://koxuliziva.iblogger.org/joxofowotixisekifine.pdf
    • http://toxedixekerej.22web.org/fagalo.pdf
    • https://cdn-cms.f-static.net/uploads/4492555/normal_60192d5614af5.pdf
    • https://cdn-cms.f-static.net/uploads/4392861/normal_601298453010b.pdf
    • https://cdn-cms.f-static.net/uploads/4406482/normal_6026f20d43ea2.pdf
    • https://static.s123-cdn-static.com/uploads/4487894/normal_5fe549b1459e6.pdf
    • http://zawimumerefop.iblogger.org/camping_checklist_uk.pdf
    • http://datekal.22web.org/aimsun_user_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xonukekavufimil.epizy.com/87486113397.pdf
    • http://mekebinaga.rf.gd/important_days_in_january_2020_with_themes.pdf
    • https://uploads.strikinglycdn.com/files/bba0b4c4-820e-4cc2-bcfe-1a5dad93ae80/3654073570.pdf
    • https://uploads.strikinglycdn.com/files/12ac8f03-f769-4cd6-9502-2ff338753156/how_to_replace_springs_on_recliner.pdf
    • https://s3.amazonaws.com/bakoloj/gmail_account_recovery_form_phone_number.pdf
    • https://uploads.strikinglycdn.com/files/c42a3011-1cce-40a0-8edd-31d63611935e/jafabigu.pdf
    • https://uploads.strikinglycdn.com/files/6e8275b3-38ff-4495-bf0f-e82c61f7edbd/honeywell_xenon_1900_driver_windows_10.pdf
    • https://s3.amazonaws.com/meludav/how_to_use_dvd_player_without_remote.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_off0000ed81.bin
d6dd7609ed536286309bb11e6d5a9c6a844e179fde8bfe8ad654520942faca3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xED81 5624 bytes
font_01_sfnt_off000100a0.bin
fe92f0a69dea9365d3fa2b3ca253a1362562a96ddf52a4152a10b91892395168
pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 10348 bytes