Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5ed72f52293241…

MALICIOUS

PDF

79.6 KB Created: 2021-04-13 10:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9932251784463d655a279d380bc0dbc SHA-1: 24991cd3d556995f6fbe11fecbee373843d139fa SHA-256: 1f5ed72f52293241e8c7e92e3d82b5e6a5e093c047920d38759263081e9c6288
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'guitar fret notes poster', which is likely a pretext to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=guitar+fret+notes+poster
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/888304245.pdf
    • https://xutobegepoxebax.weebly.com/uploads/1/3/5/3/135333125/vinilepar.pdf
    • https://cdn.sqhk.co/numavagoko/rQDhesj/pugoserawibujeli.pdf
    • https://gelekale.weebly.com/uploads/1/3/4/2/134266195/8383930.pdf
    • https://cdn.sqhk.co/gavezexu/4wnxjcD/50355297350.pdf
    • http://photoforce.ru/railway_cross_section_drawing78n1b.pdf
    • http://wajofima.mywebcommunity.org/anti_bullying_descubrir_el_acoso_escolar_y_combatirlo.pdf
    • http://somubuzesixuwun.getenjoyment.net/bezukazarenoru.pdf
    • https://cdn.sqhk.co/jasowipe/mgdibAj/lionheart_tactics_error_805.pdf
    • https://cdn.sqhk.co/jusulikipe/gjrmMpo/injustice_2_legendary_edition_pc_review.pdf
    • https://cdn.sqhk.co/rokajoten/gjyjchi/diablo_3_cosmic_wings_guide.pdf
    • http://mezajozugabaso.getenjoyment.net/23697403393.pdf
    • http://pshcomonhere.xyz/roadside_picnic_english_translation1zl0g.pdf
    • http://grizhoff.ru/romadevirrn79.pdf
    • https://bofakodejo.weebly.com/uploads/1/3/4/2/134265658/8681861.pdf
    • http://help-copyrightservice.xyz/what_were_the_consequences_for_mexico_of_the_treaty_of_guadalupe_hidalgoxqale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kizugokofo/dazelefafedivapug.pdf
    • http://wodowepakimeko.onlinewebshop.net/dowebatapesaluwuwu.pdf
    • https://s3.amazonaws.com/sumesawoxajew/nintendo_ds_lite_carry_bag.pdf
    • https://uploads.strikinglycdn.com/files/91cd3355-ffdf-4718-8fd6-149fdc5d5f67/siketobaresixuj.pdf
    • https://uploads.strikinglycdn.com/files/80c8c1e7-e7fb-46a5-aadf-3e69edd00651/kung_fu_panda_turtle_my_time_has_come.pdf
    • https://s3.amazonaws.com/jeworurowam/fortnite_clan_logo_template.pdf
    • http://padusij.onlinewebshop.net/how_to_become_a_teacher_in_texas_from_mexico.pdf
    • https://s3.amazonaws.com/dazawojob/82149038046.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_off0000f820.bin
4363ae88266b6709366a40a11e66e85fa636a1f6f1bd16213afdefc44bd54bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF820 4892 bytes
font_01_sfnt_off000108db.bin
c71c4fc53e64087fa4f9b56dba73e369e793fbf24d5c2d69ce4af8b400300978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108DB 11828 bytes

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