Malicious PDF — malware analysis report

Static analysis result for SHA-256 2619c0f4cc0d50d2…

MALICIOUS

PDF

113.2 KB Created: 2021-03-20 05:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 093f3cace119ac6b096f4b7ee70fbd1f SHA-1: 57570d9a9a4c43838285174424ba5ed4c4df9452 SHA-256: 2619c0f4cc0d50d2e1c4f4afcf7dbf7912268ed5fd76cd513ab2bcaac67f566d
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to external websites, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to educational materials, aiming to trick users into visiting the malicious URLs.

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://leonvi.ru/wix?keyword=daily+language+review+grade+7+week+10+answer+key
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/lakubulajoriv.pdf
    • https://cdn.sqhk.co/riraxizilob/Zhcugd8/55145881016.pdf
    • https://cdn.sqhk.co/rabuvimi/djfsjgg/huey_lewis_sports_american_psycho.pdf
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/fozuteg-jisux.pdf
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5ffd1ea8990a4.pdf
    • http://trafikcezaodebayisi.com/chemical_word_equations_1_worksheet_answerstsfvz.pdf
    • http://jabilevij.mypressonline.com/quadratic_sequences_worksheet.pdf
    • http://plafond.xyz/focusrite_18i20_3rd_gen_latencyqmwqq.pdf
    • http://ribadubeko.scienceontheweb.net/ronunamazawisazubulutizag.pdf
    • https://cdn-cms.f-static.net/uploads/4372085/normal_600f7dd7c1b6a.pdf
    • https://cdn.sqhk.co/karapazepot/17haogi/guns_and_spurs_2_mod_apk_an1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kewetanetoza.atwebpages.com/joint_of_two_normal_distribution.pdf
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_f8c24a2fdfc34404aa768686afcdc717.pdf?index=true
    • https://27aa3d6a-fcc1-4574-a8e0-77dd5bf64dcc.filesusr.com/ugd/7683ec_c0ad5c81ec3f47e0bfac4d238ee7b460.pdf?index=true
    • 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_off00017818.bin
0a03f2b0a5eaba6c63884b9939fd4d3df39290a0cf87f59abaf9c3d9319f9f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17818 5584 bytes
font_01_sfnt_off00018b56.bin
ceff0c909deeff8862960cb74b79a8426ff4ce1cc99b9f971c35fd3b99340953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B56 13144 bytes

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