Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae785ed5ceb30ef5…

MALICIOUS

PDF

83.0 KB Created: 2021-02-20 11:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c7ae9e16ae305380c2c3ca279a8c7ea1 SHA-1: b3ad7628a7ca1d6550b8af4fdbc339d3ca345382 SHA-256: ae785ed5ceb30ef56f6fe36120efde18c9675989431c96c8dbbdc42485d5ee1f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure for downloading a pronunciation guide. The presence of an embedded URL indicates an attempt to direct the user to a malicious resource, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=english+pronunciation+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5ffb96cf0f303.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/he0ibia/8006461087.pdfIn PDF document text
    • http://ponaleke.iblogger.org/acrostic_poem_template_generator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_600a738be7d0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490961/normal_5fddf4b2706f0.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/bUjacgj/30304106742.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/ggjOjed/xanaxewe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_600623d599aab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luborinizu/48782997770.pdfIn PDF document text
    • http://karifopiti.epizy.com/74361581517.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/31684648950.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/axe._io_mod_apk.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/81925506896.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/fogemobijorikibupuwib.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/rolunobatufiji.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/18375928467.pdfIn PDF document text
    • http://gowamatul.epizy.com/3688309790.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/lawamax.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/fuguvo.pdfIn PDF document text
    • http://gemakeruw.epizy.com/58580322593.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 5464 bytes
SHA-256: 19b74bbbf6a3ca21348fbb4b69d6d976460831d6b23efe6206578a14a94ac444
font_01_sfnt_off0000f7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F1 2896 bytes
SHA-256: fea060850cc171d2a4556a9809dd4d75d12e62dd6908268e563804c2d58f2298
font_02_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 10244 bytes
SHA-256: 2a74718927962b7906af31be73990c8359f1610a7a0bb1e88d7554b1025de405
font_03_sfnt_off00012779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12779 16544 bytes
SHA-256: 49230a07578f2a0b108554ff1d47b1cb24b8f8081254bad551c0ce72ea05e0a5

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