Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f91ce49085129f…

MALICIOUS

PDF

89.8 KB Created: 2021-03-14 00:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff77d87011013daa6a6659ad469ed811 SHA-1: 322a1d41188184e2948ce257fccfe710bff351a7 SHA-256: d1f91ce49085129fe377b1d6a742e9139e67677bb0d0c6dfdbd8acb5a5d99690
96 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a compromised or malicious site.

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://maypoin.ru/wix?keyword=unidad+3+etapa+3+answers
    • https://cdn.sqhk.co/fuwunikuneg/glhgdjg/neon_chrome_switch_review.pdf
    • http://chambrehub.xyz/lou_gehrig_farewell_speech_tonewqyz2.pdf
    • http://powerhdniy.space/42870991450cc8nk.pdf
    • http://theraisins.pro/zezigegigobelv9vb.pdf
    • https://cdn.sqhk.co/berirenike/0iiLRlI/30990751047.pdf
    • http://about-igsupport.com/4631027692u6ak1.pdf
    • http://crubr.space/korean_basic_grammar_rulesbd3j0.pdf
    • http://itdiscount.info/37767223444odfa8.pdf
    • http://bonmarket.site/71131117571xh7wj.pdf
    • http://znakomstva18x.site/canon_speedlite_600ex-rt_compatible_camerash1dgo.pdf
    • http://padlamadla.site/contraception_guideline_malaysia5p4rg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vapite/wopemokebaride.pdf
    • https://s3.amazonaws.com/daxemo/british_airways_pilots_strike_information.pdf
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_2592395cdc234576aba040ffd2bd33e2.pdf?index=true
    • https://s3.amazonaws.com/wopari/nenijuposunawagad.pdf
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_f1481334b9b148fdb715ed0e1891f92d.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_off0001202d.bin
b25b1187d3aeb63e35ecd849818e7792387e59e6229773177b5e8fe1414e8a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 5168 bytes
font_01_sfnt_off000131e3.bin
ac4d89b2a6625f65aebba67d6ce2bb98c6f64c0ba7df27768852a4d6689a888e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131E3 12388 bytes

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