Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a455bc09bcbfac…

MALICIOUS

PDF

81.3 KB Created: 2021-02-21 14:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6d3bb261769237d09b8bed981feade6b SHA-1: e20d06f284cbc5bd2388be9bf05bd45eb1f21800 SHA-256: a6a455bc09bcbface09c3f4d02510290a7febd932b92bfafc24352f9d7af0245
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to game guides, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=ark+gacha+loot+guide PDF link annotation
    • http://firstreadersclub.com/lista_de_verbos_irregulares_en_ingles_pronunciacion_y_significadoyczgb.pdfIn PDF document text
    • https://cdn.sqhk.co/kekazorub/ngjol2y/mamipesepek.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/coreldraw_graphics_suite_2018_cracknpc67.pdfIn PDF document text
    • http://opensol.xyz/jevozonusunemimomoxekucx3qz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413712/normal_5ff77381aa362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_600dc8ca906c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417030/normal_5fe2a242c1111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_600ae70a478ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_601097e76ac74.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/toguvaju/hatikvah_sheet_music_flute.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/ajooba_movie_video_song_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/pompeii_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/tazafoxufuwunaginololu.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/picadura_de_araa_tratamiento.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_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 5076 bytes
SHA-256: 23ac66101fcc91f019c6224bfc76d4801ed2f694a411a6ac5ece66d549b39325
font_01_sfnt_off00011420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11420 10716 bytes
SHA-256: c32f80f456d1fed6bdb3d653ef10ec91d1a15620328a850079820f18b74836bc

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