Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b4ea9d55fbcb6a…

MALICIOUS

PDF

83.3 KB Created: 2021-03-14 14:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2b345ad658a1ef74c35f9207026fef14 SHA-1: 5746c38df03a64f8034aef62cc9a611544dddef6 SHA-256: f4b4ea9d55fbcb6a15c960821f3c2ad3a2f779e260151686ceebaa0af3cc87b3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of a malicious URL suggests the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/award?keyword=probability+theory+and+examples+solutions+pdf PDF link annotation
    • https://cdn.sqhk.co/rudugebakivo/xggpjfU/hopeless_raider_fps_shooting_game_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/khhbgdE/infection_rate_in_orlando_florida.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/pakistan_journal_of_botany_research_papers.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/10157413056.pdfIn PDF document text
    • http://nonowun.mywebcommunity.org/sony_dcr-sx22e_price.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/why_does_my_thermostat_say_error.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/2020_big_data_analytics_market_study.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/befbb921-6f4e-4530-a6f7-33c017229a37/jafojuke.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/galatea_pc_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c41930cc-c283-48cc-a3af-3c9dea9dd310/20502298462.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/riven_jungle_guide_s8.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/prophetic_declaration_for_the_month_of_october_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99851aed-550f-426b-ae81-18f645eb70d3/lincoln_electric_welder_140_hd_weld_pak.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/aarp_united_healthcare_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/suranevovijodinamebumi.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/repair_sloan_flushmate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efdfa641-0332-4335-a458-6cebcee1b417/blackstar_id_core_10_v2_metal_settings.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/26429519352.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 5592 bytes
SHA-256: ec8abac1a03e39a820cc7c99b6b6ef45372105f3a53964eb02d6f92d22618961
font_01_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 11392 bytes
SHA-256: ff6d74591511f035f346b0f8cabd777cb8b9cc907dc4e858e1625b778c62b861
font_02_sfnt_off00012af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF3 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2

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