Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e67530eb4d7e81f…

MALICIOUS

PDF

88.7 KB Created: 2021-03-25 09:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d8900868c7affac2d5f7bc98d1320cf SHA-1: 23962f6204f31baf717c072d6a3cb756aeec871d SHA-256: 5e67530eb4d7e81fcdbad1f5296464f8c8fcedad860408230ee139c616be30a0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, appears to contain metadata related to its creation, suggesting it was generated programmatically to serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=a+series+of+unfortunate+events+movie+director
    • https://cdn.sqhk.co/ramazunor/Rigdghj/82805239020.pdf
    • http://lovupijuti.getenjoyment.net/kriteria_sepsis_neonatorum.pdf
    • https://cdn.sqhk.co/dojaxeje/hfhiKhc/fogufelu.pdf
    • https://cdn-cms.f-static.net/uploads/4382414/normal_6054db9918e24.pdf
    • http://winoxolupuvil.getenjoyment.net/how_to_get_better_mpg_5.9_cummins.pdf
    • https://wurudejokifar.weebly.com/uploads/1/3/0/7/130776262/9266411.pdf
    • https://cdn.sqhk.co/sadoburola/RhhhcOT/81274831923.pdf
    • https://rovisudaguxu.weebly.com/uploads/1/3/1/4/131438800/zotukazosogi-mawufepi-jaxejofixop.pdf
    • http://shoop-fo.ru/gebotnwaz5.pdf
    • https://cdn-cms.f-static.net/uploads/4454426/normal_60183ef683e78.pdf
    • http://requiremcgood.com/verb_to_be_gameseq287.pdf
    • http://benaletuzulug.sportsontheweb.net/limirofafumanegifomodala.pdf
    • http://koponegigat.medianewsonline.com/metekuzute.pdf
    • https://cdn.sqhk.co/bevibubos/5jjtGie/best_windows_emulator_app_for_android.pdf
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/jalodewujugizulur.pdf
    • http://stankoff.org/ms_excel_2016_tutorial_free_download83eb0.pdf
    • https://cdn.sqhk.co/wogigixa/XwjbDjg/jaribekenelijudi.pdf
    • https://mazazujusuvazix.weebly.com/uploads/1/3/1/8/131856432/bozasaxenupawe.pdf
    • http://help-nanny.site/94379976547lfuuv.pdf
    • https://cdn-cms.f-static.net/uploads/4459162/normal_60387b67621b3.pdf
    • https://bobejezesolaz.weebly.com/uploads/1/3/4/6/134622741/matujadakurukipod.pdf
    • http://supobesopo.mygamesonline.org/watog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/forupokisip/pixolamedupise.pdf
    • https://s3.amazonaws.com/bajuse/biometric_fingerprint_reader_software.pdf
    • https://s3.amazonaws.com/jazofi/powerpoint_presentation_timeline_template_free.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_off00011d87.bin
f8e7a3bd635ff52b516f4cbc51814d5d2aa31521d07716d214e4ffb21ac3f955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D87 5184 bytes
font_01_sfnt_off00012f1c.bin
473e06a91ee01c5078520fb504a3fa5a909d70594c9821b0e02eaac0c7519d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1C 10932 bytes

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