Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59f772a9ca4d8cb…

MALICIOUS

PDF

79.0 KB Created: 2021-03-20 16:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 643c70a44b5c71a8eeb05126a3da0de7 SHA-1: 2e1aeb5f99ca9e182cca038f4c79c11d459bda7d SHA-256: f59f772a9ca4d8cb4a74d2879db007633858a471633ab52fb58cae8949c82ce8
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious domain, likely a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=what+is+the+rarest+genetic+disorder+in+humans
    • https://jujokubibafa.weebly.com/uploads/1/3/4/6/134621517/47c6e411.pdf
    • http://tadajixilatu.scienceontheweb.net/architects_in_pune.pdf
    • http://rexonina.medianewsonline.com/53556950184.pdf
    • http://nupewijanetari.medianewsonline.com/nowonotibimito.pdf
    • http://garanibukumom.scienceontheweb.net/40614153027.pdf
    • http://kajejib.medianewsonline.com/berajupiver.pdf
    • http://gizigevom.mygamesonline.org/89227710789.pdf
    • http://najetaxu.mygamesonline.org/boss_audio_systems_r1100mk_car_amplifier.pdf
    • http://jekefidaz.mygamesonline.org/what_is_the_core_message_of_the_quran.pdf
    • https://venumokup.weebly.com/uploads/1/3/4/8/134866871/0e7e37e726124.pdf
    • http://wudenufodoroziv.scienceontheweb.net/enterobacterias_lactosa_negativas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jupudizadid/88176958431.pdf
    • https://s3.amazonaws.com/bivanud/wemosej.pdf
    • http://pizitibasowu.atwebpages.com/91205789101.pdf
    • https://s3.amazonaws.com/xupizewuxere/spanish_english_dictionary_offline.pdf
    • https://s3.amazonaws.com/mubefula/dsc_pc1832_installer_manual.pdf
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_3083eae418e14b2d98fcfde5200f1aa2.pdf?index=true
    • https://3f7ff619-1e23-491c-a925-ddda4d79b49c.filesusr.com/ugd/79c22a_a80eee6845f84fab8ba00c7bd63ed170.pdf?index=true
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_1c391cc032364666b49836768d897ec4.pdf?index=true
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_50334e7472df4f55931ba3b68c7c0ebe.pdf?index=true
    • http://dovunufesesiz.onlinewebshop.net/famous_thomas_merton_quotes.pdf
    • https://s3.amazonaws.com/dufekifaral/16380230557.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_off0000f8f6.bin
14a83f122eb8659adcfd3b408397d96053495a5a0e11b1b2354d6835a6c2ccdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F6 5336 bytes
font_01_sfnt_off00010afe.bin
d8e1d7b310e9382b9b03be654bebb814df2e168c8629d573e50db3f68beeef36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 10412 bytes

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