Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ad3d2ec2724477…

MALICIOUS

PDF

75.3 KB Created: 2021-02-11 02:55:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7d2fa1760a522a1427f91c488be8b658 SHA-1: 379f8fbf1c5953d97b39c6a4537fdcdecc77dd9e SHA-256: e4ad3d2ec2724477845c79676155db1b154ebbfce41e93858ecd3deef2d71eaa
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The presence of multiple external URLs and a heuristic indicating a 'lure' to enable macros or editing suggests the document is designed to trick the user into executing a malicious payload. The document body itself is heavily obfuscated and unreadable, providing no direct clues to its specific function beyond the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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/wb?keyword=deviation%20report%20pdf PDF link annotation
    • http://fujozed.22web.org/lalowesipalamuboje.pdfIn PDF document text
    • https://xulakuvoloja.weebly.com/uploads/1/3/0/8/130813987/larenaminunuba-zobukeme.pdfIn PDF document text
    • http://rowajenuw.iblogger.org/invoice_template_pages_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472776/normal_5fe9027f95028.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420907/normal_5fe51a7e37824.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/2501217.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/jhawjeW/gojovupusegazawa.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/febijokirozufe.pdfIn PDF document text
    • https://cdn.sqhk.co/wogebebaruro/KFlhcgi/35837256702.pdfIn PDF document text
    • https://tufubigin.weebly.com/uploads/1/3/1/4/131453284/9563970.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/dKhcRii/farowagetorusowotojeda.pdfIn PDF document text
    • https://cdn.sqhk.co/torevebeti/Zggibkl/hillside_drive_mod_apk_an1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_60136a4175663.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/portable_abbyy_finereader_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rejinivak.rf.gd/fiserovovedut.pdfIn PDF document text
    • http://tesuzegijibonu.epizy.com/weather_report_of_tomorrow_in_kolkata.pdfIn PDF document text
    • http://jizozekawa.epizy.com/block_diagram_word_template.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/61759257591.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_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 4884 bytes
SHA-256: 624e0c982357ddb403ce2f8bd77f0a1413592b98d03da2fb833285aedae00fdf
font_01_sfnt_off0000fd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD94 10200 bytes
SHA-256: a34282623a281bb0a4f1fea8b1ed2d135699e4e8f0d8b3d21106a806330f1085

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