Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc63311f45ac41b6…

MALICIOUS

PDF

87.5 KB Created: 2021-03-01 08:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f066f0c195e220996d99750aaa5152f6 SHA-1: 06320f1bd1658065c678e1e670c826673c5a8a89 SHA-256: cc63311f45ac41b6d8e717d7fd4bb80e6c8a1838afdb0bc531e2899b1d150d82
96 Risk Score

Malware Insights

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

The file is a PDF that uses a lure related to downloading a manual for a Denon AV receiver. It contains multiple embedded URLs, some of which point to potentially malicious PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wb?keyword=denon%20avr%202312%20manual%20download PDF link annotation
    • http://azakalaza3.xyz/kujofapunuvoezwf4.pdfIn PDF document text
    • http://smartbright.club/fosigedefuwaxuzodanuwutcbl0.pdfIn PDF document text
    • https://bimozasobo.weebly.com/uploads/1/3/1/3/131398313/momoko-mozazupejome.pdfIn PDF document text
    • https://bebojeraje.weebly.com/uploads/1/3/5/3/135302211/buwonagiwuz.pdfIn PDF document text
    • http://my-favshopd.online/type_x_gypsum_board_data_sheetim841.pdfIn PDF document text
    • http://omerkatanalp.com/toyota_yaris_2007_sedan_for_salepwxgl.pdfIn PDF document text
    • http://greatmasters.biz/samsung_55-inch_q60r_4k_uhd_qled_smart_tv_manuali0318.pdfIn PDF document text
    • http://all-host.site/nidewinofabesalelati51dbk.pdfIn PDF document text
    • http://giveaway2020.info/la_ajorca_de_ororgrfa.pdfIn PDF document text
    • http://specrazreshenie.com/81098951079smo26.pdfIn PDF document text
    • http://mir23.xyz/78993617337fhvbq.pdfIn PDF document text
    • http://kurs1.xyz/kopelaxoxisipajadegosialo0o.pdfIn PDF document text
    • http://xruhdfo.site/hello_kitty_cafe_irvine_menu_prices79vfv.pdfIn PDF document text
    • https://jibanexoruna.weebly.com/uploads/1/3/5/3/135338247/viluzosupilut.pdfIn PDF document text
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/9653721.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/metakibeme/cheer_bow_making_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/flame_test_lab_report_abstract.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/naa_autograph_songs_naa_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/sijuvusidezado.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 5044 bytes
SHA-256: 9e387f1b8681de769653cbaf0cb892337080c879131c6d1868576a8be1a9c95f
font_01_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 2300 bytes
SHA-256: 0af9b069fe0ec856e32b9a96e328629564e0aa01681bee36b2d7d96f4a25d705
font_02_sfnt_off00011d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2A 10892 bytes
SHA-256: 20633fd0eb0cfe62a5f9fc3d9674d0826289d19270ab12dd0bc35e90d5799af1
font_03_sfnt_off00014255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14255 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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