Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d03ec30f5ce350…

MALICIOUS

PDF

102.0 KB Created: 2021-05-19 11:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4de8153f39e2a0768b40f17db0df8a17 SHA-1: d4283912798aaa9914f0bfaac1f3e4e4004612e8 SHA-256: 70d03ec30f5ce35093cf74a132907de5e53a6b79905ad5347fc128a0d0666c44
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, indicating a phishing attempt. The embedded URL points to a domain that is likely hosting malicious content, disguised as song lyrics. No scripts were extracted, but the PDF structure itself facilitated the redirection to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://zajinet.ru/strik?utm_term=la+chanson+de+l%2527%25C3%25A9cole+je+suis+au+cp+paroles
    • https://cdn-cms.f-static.net/uploads/4454668/normal_5fd62f6355eb5.pdf
    • https://cdn-cms.f-static.net/uploads/4473410/normal_5fd1b4f8e16ee.pdf
    • https://cdn-cms.f-static.net/uploads/4457005/normal_6011369ed35a6.pdf
    • https://cdn-cms.f-static.net/uploads/4366348/normal_603638360065f.pdf
    • https://cdn-cms.f-static.net/uploads/4450154/normal_60472eeecd747.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nopexuwub.rf.gd/what_is_tcp_ip_protocol_architecture.pdf
    • https://uploads.strikinglycdn.com/files/ffaf93c6-369b-449f-9340-5df25345cee1/sovinulisuki.pdf
    • https://s3.amazonaws.com/povelenavuviw/waxekezopubiji.pdf
    • https://uploads.strikinglycdn.com/files/ac13bedc-adbb-48b7-b1a8-4d2c32906f7a/32202083387.pdf
    • https://s3.amazonaws.com/nodetuxapabara/1227280164.pdf
    • https://uploads.strikinglycdn.com/files/e8229ae6-cb9e-4ced-ac5d-f1b2bce4f985/what_is_narrative_paradigm_theory.pdf
    • https://s3.amazonaws.com/varolexexus/baby_g_shock_white_replacement_band.pdf
    • https://s3.amazonaws.com/muwemivumazulax/84697811869.pdf
    • https://s3.amazonaws.com/xufoxorog/best_stock_android_phones_under_40000.pdf
    • https://s3.amazonaws.com/gumagabu/zovuwixitupodenosita.pdf
    • https://s3.amazonaws.com/zaxawetawupo/voforirixewabefeborenudoj.pdf
    • https://uploads.strikinglycdn.com/files/2aa4019c-43a3-4eb3-886a-a95cb5dc28c3/53976267913.pdf
    • http://nesitobika.rf.gd/harry_potter_mongol_heleer.pdf
    • https://uploads.strikinglycdn.com/files/7e85a6a9-c7aa-45f6-9b33-d4831e87da8d/calculus_early_transcendentals_8th_edition_textbook_by_james_stewart.pdf
    • http://babematalal.epizy.com/achilles_tendinopathy_stretches.pdf
    • https://s3.amazonaws.com/juvetaso/ridiculous_6_songs.pdf
    • https://uploads.strikinglycdn.com/files/a2120bc2-8f90-479c-8e0a-7d995ca9f6e7/how_do_sea_otters_help_to_combat_climate_change.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128b7.bin
dff00fefebbf7c9b02008ca2a50f4d26880c109fa71e2585edaa1ad546f3f0ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128B7 3836 bytes
font_01_sfnt_off000134e5.bin
6bbf99f050a227f3840e26207564601a3664409ca1ba0e8484fb35c32339cdf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134E5 5352 bytes
font_02_sfnt_off000146dc.bin
25f2a8dc4ceacedabeef080e3b34e665d5408c1dc54d0eee6485c24d56fd372f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146DC 13744 bytes
font_03_sfnt_off00017209.bin
6bdb08bbab53cf3fd4a2559c658ec04714452394442ab289323e4533545fb2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17209 16096 bytes

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