Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da28e330296618c…

MALICIOUS

PDF

97.7 KB Created: 2020-12-24 19:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3740474a903cfd46c1775dd241014740 SHA-1: eb211158e6f201ef922dca73e7a6bedf79ac49ce SHA-256: 4da28e330296618c1881061a5d3d7a2458cc183e7e62c9679080b05a6c0829d7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'Nuclear weapon 2020' and the authoring application, suggesting a lure to a malicious site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/strik?utm_term=nuclear+weapon+2020 In PDF document text
    • https://cdn.sqhk.co/bitubebo/HjbK5bo/74831574828.pdfIn PDF document text
    • https://cdn.sqhk.co/zojisixu/djbgfhg/ironmaster_dumbbells_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/jcghpjd/praise_and_worship_songs_chords_guitar.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/ZjdH1jd/orc_dungeon_2.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/qgghgHl/fast_driftstalle_oecd.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/jbcPgjz/49208712313.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/RXGEXoJ/30464012796.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/ijQgdjj/dragon_ball_z_dokkan_battle_mod.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/zufojadibi/spyder_tl-r_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/luxaxuriwasazewilinanu.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/bakobewejerawobelu.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/pokemon_explorers_of_sky_character_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab14e17-43cc-4463-93eb-0da306e1fa49/diploid_and_haploid_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/fapezuvulet.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/siwufigoju.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_off000131c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C1 4836 bytes
SHA-256: 7b5955bd604c91fbce0835c64217259ee43d678887142d0c9aa8f9d4812e56d8
font_01_sfnt_off00014243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14243 12324 bytes
SHA-256: 11f0ad61dc356c4669b875621f5d0835e0e03e8dce90bb11699887e232f396a2
font_02_sfnt_off00016b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B88 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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