Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0b3470d6851b19…

MALICIOUS

PDF

79.8 KB Created: 2021-06-09 04:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 140ca639b20f9565c03dc606e2f46c80 SHA-1: 04be00f7be468edaa20ffea7418d71b4304dd1a8 SHA-256: 8c0b3470d6851b195b61abb4c9caa5868651ae8efd04831a293dcecd2a8f5be6
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to a resource that promises a "brawl stars apk hack ios", indicating a social engineering lure. The presence of an external URI suggests the document is designed to redirect the user to a malicious site or download a payload.

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://inwebjor.ru/pbw?utm_term=brawl+stars+apk+hack+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386080/normal_6054bca4dbadc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_5fdb381907781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_6055730dd888e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_60501fab20ef3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491725/normal_5fffbaa2edcf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409799/normal_605d6d3d40843.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_606951c68645b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_60538ae430509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477408/normal_600fe7ec31d23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_601152593b1eb.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
    • http://kokoxudalux.pbworks.com/f/nedira.pdfIn PDF document text
    • http://mokapuv.pbworks.com/w/file/fetch/144709905/89842117603.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/w/file/fetch/144539430/abuela_invents_the_zero_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bff982c-6051-4396-8319-7faf0ecdd848/club_car_parts_south_africa.pdfIn PDF document text
    • http://bolejagum.pbworks.com/w/file/fetch/144740238/34080235735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0885710-5112-489d-b5ad-b195505e1e01/why_is_my_monster_led_remote_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9d0bf4-b523-44b4-88a9-8b4d6d0d3f49/grobs_basic_electronics_11th_edition_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f32409b-749d-4636-82f3-d72fadc69017/7426378965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63c8fcc-cb6b-4da6-8a4f-a8ad2f5939cd/zabusovuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ba76f2-e048-4ff6-89e4-85922a56292e/sifikadawulifexewakitij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c8464e-855d-4e70-9f1c-cd626be3b84a/sony_a6500_lens_bundle.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 4788 bytes
SHA-256: 3a64f7dea2deb09253373996a80777102b7ac992319cd1fcb944cc1fb8ebc046
font_01_sfnt_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 11868 bytes
SHA-256: ba8890c02bcdcf1a2a51f5b39e26682dcc6bdbaf56f876ef3abf71d0cd234498
font_02_sfnt_off00012435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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