Malicious PDF — malware analysis report

Static analysis result for SHA-256 8666abe1acda8982…

MALICIOUS

PDF

77.9 KB Created: 2021-03-29 01:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dba5a75d814e5a1337a591002f07e580 SHA-1: 273f231a1b3f7e5d29d27076683043d62b336de5 SHA-256: 8666abe1acda89829d20908b975f6baa98cdfba0d5ee5a0993a26b83719bdc17
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely intended to deliver a secondary payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to educational materials.

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://jacksth.ru/wix?keyword=discovering+french+rouge+workbook+answers+unit+3
    • http://creampiepow.club/vuwebifuvalodajydlv5.pdf
    • https://cdn.sqhk.co/xejudawadoni/dkZKjc2/artecture_draw_sketch_paint.pdf
    • http://idem-peshkom.ru/tekavabowisasepinpf9rd.pdf
    • http://bandalet.club/vortex_cloud_gaming_free_modzdeue.pdf
    • https://cdn.sqhk.co/gabadifofibo/ib6hfCO/11547498038.pdf
    • http://helpcopyright-service.com/546287042293h7kj.pdf
    • https://cdn.sqhk.co/jimumakevaji/iyjcigY/31388243134.pdf
    • https://cdn.sqhk.co/xugumewaz/IibYzes/bank_of_america_mobile_wallet_terms_and_conditions.pdf
    • https://cdn.sqhk.co/dobulefipuji/KTI1gep/lolofodoz.pdf
    • http://salestore.pro/xipefulagl03y.pdf
    • http://kugewezebuvigiw.mygamesonline.org/50771082044.pdf
    • http://fuxuxixigu.scienceontheweb.net/biceps_triceps_workout.pdf
    • http://jepewadagamer.scienceontheweb.net/how_do_you_use_the_command_key_on_a_mac_with_windows_keyboard.pdf
    • http://reduslimitaly-official.site/cirque_du_freak_is_it_a_real_story8x8bu.pdf
    • http://eushopvmn.site/mowumixoturanapejamedc8fk8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/156e82d8-dd69-4858-90cb-329574a5eb59/ps_i_still_love_you_netflix_release_time_philippines.pdf
    • https://uploads.strikinglycdn.com/files/ef461acc-780d-4a16-98ff-70194c317da5/asp.net_interview_questions_and_answers_free_download.pdf
    • https://uploads.strikinglycdn.com/files/3cea1f25-33ae-4b94-9004-bd7a1d4f47fe/list_of_basic_words_in_spanish.pdf
    • http://wareguw.atwebpages.com/75153957774.pdf
    • https://uploads.strikinglycdn.com/files/bba3ef26-0b71-4d55-9134-a42ca6298109/how_to_use_google_maps_for_walking_directions.pdf
    • https://uploads.strikinglycdn.com/files/00eb85c9-28bd-4f1b-abdb-d15b6e082f09/laviribe.pdf
    • https://uploads.strikinglycdn.com/files/296bb84d-fd21-49f0-b801-bb8a4400e612/manual_de_primeros_auxilios_cruz_roja_ecuatoriana_2018.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_off0000f0a4.bin
35ada4477444e2913317564d465d28ac4e2d76ad90c7cbca9440fc47257149c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 5632 bytes
font_01_sfnt_off000103f0.bin
32bf91b5a18d9414ac01d70e840375ec28131cdda35af862a93b94133e145165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 11192 bytes

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