Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d715a2cdb4f6da…

MALICIOUS

PDF

71.9 KB Created: 2021-02-13 01:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 928e6e3ab43c707129571e9722708402 SHA-1: b183f5275218f4dcd7c05bcb8a413732089fe5a6 SHA-256: 73d715a2cdb4f6da333be17e3931cf170e23abf12814a3fd87254b985ed27c6a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing lure.

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://seumenha.ru/wix?keyword=penteconter+assassin%2527s+creed+odyssey
    • https://static.s123-cdn-static.com/uploads/4460457/normal_5feb461441d80.pdf
    • https://cdn-cms.f-static.net/uploads/4406168/normal_601ce0df2a47d.pdf
    • https://cdn.sqhk.co/kulobuwaxegu/aZqYK1D/download_supreme_duelist_stickman_mod_apk.pdf
    • http://meetporte.xyz/chickenpox_in_pregnancy_guidelinesz8998.pdf
    • http://fojowufuzuno.22web.org/solutions_colloids_and_suspensions_worksheet_answer_key.pdf
    • https://cdn.sqhk.co/levowexesu/Fjfihha/wegelofosetotibodozom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fanirivi.rf.gd/liftmaster_garage_door_opener_41ac050-_1_manual.pdf
    • https://s3.amazonaws.com/lovomijelun/7940944554.pdf
    • https://s3.amazonaws.com/susonanezaj/63966695621.pdf
    • https://s3.amazonaws.com/jedobufudajewu/haccp_plan_template_australia.pdf
    • http://begilokikilox.rf.gd/vosiraranitodujoroxikal.pdf
    • https://s3.amazonaws.com/rimejiguvif/xuxoradefejelilozigon.pdf
    • https://s3.amazonaws.com/vokeri/43704578737.pdf
    • https://s3.amazonaws.com/rekawexuretowo/didarowekinelinefemofa.pdf
    • http://xevivalekivo.epizy.com/roblox_game_free_play_no.pdf
    • https://s3.amazonaws.com/sazariwapa/buwan.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_off0000da4f.bin
085bf02c5e409f70b66de997b58a2d27df60687fed013577c775c26fe83890af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4F 5036 bytes
font_01_sfnt_off0000eb8e.bin
a7d1219798879a3d74ff2020a9dddbb1f802da6ecb47f4a0c24aba86834928ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 11608 bytes

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