Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a55b8a670686ee…

MALICIOUS

PDF

84.0 KB Created: 2021-06-02 03:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 796bf56bf39fc34a0037afc2cf31f349 SHA-1: 14807791c72d3d3e74da9adf5bb7231412bed0ef SHA-256: 77a55b8a670686ee4a51fc66e5c81eafca5f23be2b75390413c9f89f80ec49ac
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a site offering a game mod download, which is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious resource.

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://pistant.ru/pbw?utm_term=beach+buggy+blitz+mod+apk+happymod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481280/normal_600dc22e7f1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_602d4db869274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427523/normal_5ff2034344acf.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/4ed6c951-66b7-48a0-b655-8712af45fad4/16468006860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f55aa4-629d-4169-9dfb-8ffe9ce65766/vijomesorakerudaron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb582ef-4a1f-48fe-9be3-5f08b19e4d0a/similar_triangles_word_problems_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8219b803-0259-4633-b635-c99f0e8b2789/how_to_use_waveform_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3ef5ed-9e5b-4830-a80c-1ad8a86d50f3/6084760655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c5e7bef-c1d9-4f11-80a6-75e7558f6195/hp_p3015_fuser_replacement_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896ef09e-11a8-4673-9ac9-cbd38d41a3f9/how_to_put_curtain_rod_on_metal_door.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2e167f-2040-4857-8636-df7ac8764311/95967685498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c921f499-6034-4938-bb44-9607cfce8d61/28121855961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fe408e-39a6-4210-a75e-ccaba01fa2c9/laxupejoxokojonalenot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d511540-08a2-4250-a2d4-70e25622dfe4/magic_chef_dishwasher_replacement_parts.pdfIn PDF document text
    • http://nerobedevu.pbworks.com/w/file/fetch/144447558/89075816417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e4bef5c-5009-4d17-a9d3-70d1528b42a6/putixinefote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7bae16-4eb7-4c4b-9293-7313d30b4f9f/38141330810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e688be98-90df-4c2e-8552-5dd92ccf121c/15062155634.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144457710/nelavolamopoxagilejafefov.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/how_to_use_allshare_play_on_samsung_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7904565-7596-4133-ba28-1ffaf7e03b31/learn_typewriter_repair.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_off0000eed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 5620 bytes
SHA-256: 5066f421c9b84058e1a7ad4c22ce6813a0489b330136caed802104f1a17db39a
font_01_sfnt_off000101d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 13680 bytes
SHA-256: 1176b26406321407d4bf79c3ec2bf0afc9da0a5d0d3de9a20bea99bce5b067ee
font_02_sfnt_off00012d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D60 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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