Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ef7de3afa68f9e…

MALICIOUS

PDF

90.7 KB Created: 2020-11-17 14:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8036a24f896b502f938b13f0db55001 SHA-1: 1aba33c10f590cb3e18364e385cf7bd079139f6d SHA-256: 95ef7de3afa68f9e5c4aa5bf7655f00ab8e7c841edd137b758f477603151c25a
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The PDF contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely used to host a phishing page or distribute further malware. No scripts were extracted, but the presence of an external URI in a detected malicious PDF suggests an attempt to redirect the user to a harmful site.

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://traffset.ru/strik?utm_term=%25D8%25A7%25D9%2584%25D9%2581%25D8%25AA%25D8%25A7%25D8%25A9+%25D8%25AA%25D8%25B8%25D9%2587%25D8%25B1+%25D8%25B5%25D8%25AF%25D8%25B1%25D9%2587%25D8%25A7
    • https://zanelonovubut.weebly.com/uploads/1/3/4/3/134315015/843cbdc2b6e.pdf
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/280630.pdf
    • https://sokegipamemaxo.weebly.com/uploads/1/3/4/3/134345901/937941f73.pdf
    • https://ganusanawopat.weebly.com/uploads/1/3/4/4/134488834/turotobimupi.pdf
    • https://numobokofe.weebly.com/uploads/1/3/4/5/134501802/9387843.pdf
    • https://fovavizudaz.weebly.com/uploads/1/3/4/3/134375550/pazegesusozupab_xatidijerawa.pdf
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/5f43dfd0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kofabube/character_map_windows_10.pdf
    • https://s3.amazonaws.com/zirojopemup/fusionner_avec_adobe_acrobat_reader.pdf
    • https://s3.amazonaws.com/juduk/the_man_who_walked_between_the_towers_genre.pdf
    • https://s3.amazonaws.com/betefowubevat/bunapoxujudavufivixu.pdf
    • https://s3.amazonaws.com/mutirexa/formato_certificado_medico_ssa.pdf
    • https://s3.amazonaws.com/luramamelolem/alamance_burlington_school_system_reopening.pdf
    • https://s3.amazonaws.com/xozeb/mx_player_apkpure.pdf
    • https://uploads.strikinglycdn.com/files/a4baba97-18f1-4404-922b-0b3751d2a8dd/histotechnology_a_self-instructional_text.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000123a6.bin
e73abf580cba72805ca026902758a61b0585438749c431c5e67f1d3339591d2c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x123A6 31508 bytes
font_00_sfnt_off0000e148.bin
f7be38b2fa677f6ee1dfbb51eddb29e820abac98a6373e955bcd68c0e7d00741		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE148 4068 bytes
font_01_sfnt_off0000ef26.bin
67d1b54ccc4bd3b113ac79f8b47c830fe016034bf2009c4909f791992d12c3ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF26 7552 bytes
font_02_sfnt_off00010922.bin
3d526d907855fd97e6068d7636a928217c27ebfffcdf3318a5161dec86c5de11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10922 17644 bytes

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