Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9434184b9a4104…

MALICIOUS

PDF

81.0 KB Created: 2021-03-18 12:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 641b3436f4076966e09b08cc4ab4797a SHA-1: 539ec4c94e85d1ac35fbf0bed5a8861edad24297 SHA-256: 3a9434184b9a41043ec14f186d7881ca53eeb812256c45b4bc6cda4afa79b7e7
144 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links and lures, including an invisible link to a domain associated with phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading a secondary payload disguised as a driver. No scripts were extracted, but the presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/strik?utm_term=logitech+keyboard+k330+driver PDF link annotation
    • http://noziwop.22web.org/41611353179.pdfIn PDF document text
    • http://poroda.site/55076910643v8hsd.pdfIn PDF document text
    • http://bixifofagowezi.22web.org/wow_shaman_guide_leveling.pdfIn PDF document text
    • http://dreabling.online/flir_one_pro_lt_pro-grade_thermal_camera_for_iosqoh9i.pdfIn PDF document text
    • http://easylearning.space/nogazuniwusawizaxatisebc1bjl.pdfIn PDF document text
    • http://discount50.pro/ejercicios_pronombres_personales_tnv78fq.pdfIn PDF document text
    • http://arendagg.xyz/nekefaxibibemoxotubaroztkuud.pdfIn PDF document text
    • http://50offstore.info/35092282244rbt38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_601f3b7ce8fbc.pdfIn PDF document text
    • http://onatural.space/garmin_nuvi_50lm_lifetime_map_updatesw75fw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60199959187bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_601ad4ef7ca42.pdfIn PDF document text
    • http://dress-russia.ru/661989441955umpg.pdfIn PDF document text
    • http://com-login8.xyz/amazing_grace_flute_solo_sheet_music_freenlfat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/appreciation_quotes_for_dance_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/manageengine_servicedesk_plus_administrator_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/titafubor.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/sygic_truck_full_cracked_apk.pdfIn PDF document text
    • http://wuxiwojimi.rf.gd/how_to_do_enthalpy_change_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/pamizivodo.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/ley_de_ingresos_2020_cdmx.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/10662490482.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/baby_gate_for_top_of_stairs.pdfIn PDF document text
    • http://rozepof.rf.gd/capstone_project_civil_engineering.pdfIn PDF document text
    • http://parubupo.epizy.com/12995473310.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/punodotevabofekonepez.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 5604 bytes
SHA-256: 94714379c6769d1d8c799fb2919154561d13fdfb04c0db5fd96ed73194b7344c
font_01_sfnt_off0001101c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101C 10800 bytes
SHA-256: 9eae9015bfe93e3319170040b2b0e7899d8756220b0cdc0798a45120ddac1684

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