Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d3b2ab44ab4abc…

MALICIOUS

PDF

75.0 KB Created: 2021-04-04 12:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d4ab415f5593fa6486ba6b5d016b52e SHA-1: 77c16e7828ea6cc69589c8a25a92cf523235563a SHA-256: 21d3b2ab44ab4abcad7e902958e273cc58d8e1cda2fa01db22972513001dc305
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a phishing-related domain, as indicated by the 'PDF_URI' heuristic and the ClamAV detection. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'amplificateur de puissance classe a exercices corrig s pdf'. The presence of embedded JavaScript, despite the document being a PDF, suggests an attempt to execute malicious code or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/award?keyword=amplificateur+de+puissance+classe+a+exercices+corrig%25C3%25A9s+pdf
    • https://gakikodokuni.weebly.com/uploads/1/3/1/8/131857060/73e0be4.pdf
    • https://static.s123-cdn-static.com/uploads/4462056/normal_5fcd2c59d4b5c.pdf
    • https://cdn-cms.f-static.net/uploads/4454306/normal_60600709237de.pdf
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/gatodovutuwuse.pdf
    • https://cdn-cms.f-static.net/uploads/4379851/normal_601619785a66f.pdf
    • https://xiwupezarevapo.weebly.com/uploads/1/3/2/6/132681984/2f3eeae1914f9.pdf
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5ff8c44247eb7.pdf
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/73eb2ed5945deb.pdf
    • https://cdn-cms.f-static.net/uploads/4424683/normal_60392cc8d8ab6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fiwixowu.rf.gd/piriformis_muscle_compressing_the_sciatic_nerve.pdf
    • http://kajufikuxididon.rf.gd/dnd_moon_druid_guide.pdf
    • http://repajazofuwide.epizy.com/fametitiwixegabatonewanuw.pdf
    • https://uploads.strikinglycdn.com/files/ebd26407-ae7e-415b-bc98-ecb799a9281b/91693563159.pdf
    • https://uploads.strikinglycdn.com/files/19f44672-203d-4da9-818f-7eed0245f4c6/what_is_the_myth_of_oedipus.pdf
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_9e87b3a4ffaa4356b395140c0f9b6d69.pdf?index=true
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_241adee0ced2499b90a886ef1369b31b.pdf?index=true
    • https://s3.amazonaws.com/wunupalezozerud/factory_reset_android_7.pdf
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_6aeaea634eb84daea87d67d42331abef.pdf?index=true
    • http://luwunepozu.epizy.com/mafeperiravokewob.pdf
    • https://uploads.strikinglycdn.com/files/1a62e72d-629d-422d-8eea-60fc6b660efb/my_papas_waltz_analysis_tone.pdf
    • https://uploads.strikinglycdn.com/files/2e9e66e5-7d50-46e6-9487-8abdb597fee0/how_much_does_a_150_hp_mercury_motor_weight.pdf
    • https://s3.amazonaws.com/metubevozisul/tom_sawyer_song_meaning.pdf
    • http://zozusanom.epizy.com/82441363481.pdf
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_0e6b34dda5d144bdae603e8013f4c19b.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_off0000e31a.bin
bd74d3572a614bf92e417763631b187b9569fa4c5f8a961621a743a9b5d3010f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE31A 5676 bytes
font_01_sfnt_off0000f611.bin
a7386cb0d58c6bffdf42e5e28c8b32858db214d98ee4cb01e448fd3273d02303		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF611 11392 bytes

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