Malicious PDF — malware analysis report

Static analysis result for SHA-256 287bb7df1d51bf63…

MALICIOUS

PDF

123.8 KB Created: 2021-02-05 18:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a450d3e864fcb3dc2ca275316406bfae SHA-1: 309b3da77f7d8096b390f7e0b9867427a018ff2d SHA-256: 287bb7df1d51bf6304b187e5cd277a388e685dc42298193d46444cefcb15cbbe
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=android+one+root+toolkit'. This URL is likely used to lure users into downloading further malware or engaging in phishing activities. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=android+one+root+toolkit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_601a022cc2539.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/forces_1d_phetmf67v.pdfIn PDF document text
    • http://rubyshup.space/htmlwebpackplugin_template_cssoz2f7.pdfIn PDF document text
    • http://itasummer.fun/wodurajokoxf6kyr.pdfIn PDF document text
    • http://umniashka.ru/lil_peep_xxanaxx_tentacion_falling_down_lyricstpntk.pdfIn PDF document text
    • http://navaram.online/microeconomics_activity_3-_17_game_theory_answers0n2h5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401505/normal_600592008f08d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386334/normal_5ff3439e4af62.pdfIn PDF document text
    • http://vvinorama.website/honeywell_pro_series_thermostat_user_guide8oicb.pdfIn PDF document text
    • http://yewes.space/yoga_sutras_of_patanjali_edwin_bryan8kbtx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/harvard_referencing_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/38753391926.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/55278547715.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/keepass_password_safe_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/remokagomavivedurezusunok.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/zinoxuwe.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170CD 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off00017b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B10 4484 bytes
SHA-256: d0dd63dc4108d7e741fc02ab40ae65b16298f7ad9c3baeb1f3c142781c2e8b3f
font_02_sfnt_off00018a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A55 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_03_sfnt_off000195b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195B8 12140 bytes
SHA-256: 7f0ab8ebc87a4c6618221ac403e2cac2f5daa733f8b250bc89f5ece868f491c3
font_04_sfnt_off0001beac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEAC 10868 bytes
SHA-256: 59226447bca6c5029780869316b10143146d490ae97c07587afa5dbbf5305122

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