Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc4d2552c9c2258…

MALICIOUS

PDF

81.2 KB Created: 2021-03-03 11:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8933736ec90467d1aa4c09b1b51e7930 SHA-1: 5c6655d8cd064e39c42013969500c1563bfb53a8 SHA-256: ffc4d2552c9c2258e7259067013f58000ddbcfb907474b1164239ed0216b07e5
96 Risk Score

Malware Insights

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

The file is a PDF that contains obfuscated text and multiple embedded URLs, one of which is explicitly flagged as an external URI. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of URLs like 'https://gimoguvi.ru/strik?utm_term=java+1.8+download+for+windows+2016+64+bit' suggests a phishing or malware distribution lure, masquerading as a legitimate software download.

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://gimoguvi.ru/strik?utm_term=java+1.8+download+for+windows+2016+64+bit PDF link annotation
    • http://limecash.xyz/32176979661clpw4.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/ugeggid/common_bacterial_infections_in_babies.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/idUo7he/admin_template_bootstrap_w3layouts.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/glcRWjh/54334778689.pdfIn PDF document text
    • http://elinekici.online/spanish_verb_list5i6yw.pdfIn PDF document text
    • http://italia-doc.fun/take_five_sheet_music_drumscyf5w.pdfIn PDF document text
    • http://kinorio5.xyz/speaker_test_code_for_androididdun.pdfIn PDF document text
    • https://cdn.sqhk.co/lapotalodige/hfheiak/zombie_mode_pubg_lite_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/djcizjg/97543647735.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
    • https://s3.amazonaws.com/fazujo/zitogomidiso.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/love_couple_full_hd_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/24518762741.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/61944609716.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/67498980605.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/xebemepebivibufited.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_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 5644 bytes
SHA-256: e671e52ddbd4db4b02584274e7f70c868955ae85e9b88f38d15d610ec0d317b0
font_01_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 10952 bytes
SHA-256: c65bb8702363c3f2eb02d1358a07927548fe6c80808750af64a9ce3b8b20ca45
font_02_sfnt_off00012916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12916 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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