Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4105885846bc25d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-29 04:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 764e35cc420e0b0270706efb9de32744 SHA-1: 7d70e567ced818889fd97a07bd60b128fae87021 SHA-256: a4105885846bc25d7ace16f5c3ede57ab29cb65ff95fe76e1b9f14688b38db1a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure for a song title, suggesting a phishing or malware distribution attempt.

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://jumiwimov.ru/123?utm_term=chori+malai+dj+song
    • https://cdn-cms.f-static.net/uploads/4487935/normal_602c41056da7f.pdf
    • https://cdn-cms.f-static.net/uploads/4379229/normal_605fef3f046a8.pdf
    • https://cdn.sqhk.co/widexerun/iaYVihK/simple_grocery_list_android_app.pdf
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/tugabizikevonom_kugoxuladuk_gibemo_vunokasamake.pdf
    • http://tejidirexe.mywebcommunity.org/11028258475.pdf
    • https://cdn.sqhk.co/soribivevi/phbjaB4/cyclohexane_conformation_diagram.pdf
    • https://cdn-cms.f-static.net/uploads/4410727/normal_60135bc2e57b4.pdf
    • https://sotogirepatobob.weebly.com/uploads/1/3/1/4/131453915/tiladunusu_mokekono_visozepagigeli.pdf
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/gafupogetivunat_foboto_pimuwuwa.pdf
    • http://xufelaketodo.getenjoyment.net/is_it_too_late_to_plant_tomatoes_in_florida.pdf
    • https://cdn.sqhk.co/zimidenex/hcii2jc/nero_software_for_windows_xp.pdf
    • https://cdn.sqhk.co/pigajifaw/ggNgigh/kuwedijow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/35636eec-898a-47ae-ac17-d4f6dbb75f0e/adobe_premiere_pro_2.pdf
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_b4e065021a5d46f182358d7dc3f3f5bf.pdf?index=true
    • http://zotubune.myartsonline.com/34348701265.pdf
    • http://zasuwunal.myartsonline.com/nubilevoko.pdf
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_5e46eaeafffc4f978688498294b63bab.pdf?index=true
    • https://uploads.strikinglycdn.com/files/37bcf851-944d-4799-9cc7-921e699f4962/yamaha_rx-v685_daten.pdf
    • https://uploads.strikinglycdn.com/files/a051729e-54e7-4dcd-8f37-4a7a0dee5642/tabla_periodica_grupos_periodos_y_familias.pdf
    • https://uploads.strikinglycdn.com/files/c426b7f2-5167-4eb1-b572-72903073dd17/law_of_torts_rk_bangia_book_download.pdf
    • http://korofituzuxigu.onlinewebshop.net/spring_boot_tutorial_for_beginners.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_off0000e8e3.bin
4420365dfbc553197249728b9f7ca15efa2af33d7e60730ec8ae531f5e878b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 5220 bytes
font_01_sfnt_off0000fa6d.bin
a736081dcc10676f53b4925f525fdd95992a0c3cf015eb7f47202def8706f15f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 11364 bytes

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