Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cbf17498c22e582…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 11:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d75da473ad24f232902e8b26af00c694 SHA-1: b5cf0adcd61af6cadeacc21b4fbf6e95aaa5cbf0 SHA-256: 8cbf17498c22e582f33b28f32660f83034c56aa8a1b00166e719c82f0d367b17
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that appears to be a lure, disguised as a search result for a specific product. The presence of PDF-specific heuristics and the nature of the embedded URL suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=toshiba+satellite+l755+laptop+price+in+india
    • https://cdn.sqhk.co/bapuparit/gjgEjft/10833620758.pdf
    • https://cdn-cms.f-static.net/uploads/4450501/normal_6054338edf367.pdf
    • https://cdn.sqhk.co/xiladuxe/ejjUsAs/azimuth_propeller_system.pdf
    • https://nonadokemiraf.weebly.com/uploads/1/3/0/9/130969568/692852.pdf
    • https://cdn-cms.f-static.net/uploads/4404959/normal_6029d0ee5228c.pdf
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/papatonojitaw-papakomokugagi-vixiwogamipef-simuwaror.pdf
    • https://cdn.sqhk.co/bidogefapo/RhghcI5/kibowovowelagufukubi.pdf
    • http://espacecmb.xyz/stihl_ms180c_easy_start_recoil_assemblyohou5.pdf
    • https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/1e85e29c.pdf
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/120368.pdf
    • https://cdn.sqhk.co/nomavunut/4Cyhiia/christian_worship_songs_about_prayer.pdf
    • http://prizinsta24.space/88278167585ir23o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_7919741e8c6e438b887436dc4750bd4a.pdf?index=true
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_fff216f5f0594f61bb6f44e3335fc16f.pdf?index=true
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_68f02438be474354b89908e75a593004.pdf?index=true
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_9877d820c4744eaa89ab1baf479fbf4f.pdf?index=true
    • https://s3.amazonaws.com/jamuluvuvava/formation_adjointe_administrative_laurentides.pdf
    • https://s3.amazonaws.com/jolituzoji/utah_criminal_attorney_free_consultation.pdf
    • https://s3.amazonaws.com/xozeb/conflict_management_skills_in_nursing.pdf
    • https://s3.amazonaws.com/vavabi/65000190744.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da08.bin
40aa5ace5f6e9719af6c117d5ef021090a3eadd58c9c2769cbc32ec5e142daf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA08 5452 bytes
font_01_sfnt_off0000ec8c.bin
6bf48024883dc5ad94cda3f0a4f91e55326223eb1018f491a5aba3d81f4225f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 10404 bytes
font_02_sfnt_off0001109f.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 16164 bytes

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