Malicious PDF — malware analysis report

Static analysis result for SHA-256 9133afe2158ba158…

MALICIOUS

PDF

68.3 KB Created: 2021-01-01 01:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 152c25b42de1407a8bc8998cb60c8160 SHA-1: f251d1d943ef552a7748521b7b8091e5b47ab13d SHA-256: 9133afe2158ba1584df704adf9a55a41631cb91ea7540ce816e02295f60acfab
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=oscar+fish+for+sale+petco'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/strik?utm_term=oscar+fish+for+sale+petco In PDF document text
    • https://cdn.sqhk.co/vorowobenune/nWChejh/paper_toss_boss_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/oGAhai9/maximum_carnage_comic_set.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/9f408a4d-632b-4d27-a45c-bbad63da1e1b/93803467678.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/adjectives_list_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/ketuti.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/ap_human_geography_exam_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/formas_de_angariao_de_fundos.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/97631724932.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/vitipamilutob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86827b41-2765-428c-9963-81e0b8fcf022/27872728819.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/xibotudofidasuma.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/bisiratasumijezopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1de16bd-7485-47a5-a23a-676e552869db/xapizeterovazibip.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_off0000cf34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF34 5132 bytes
SHA-256: cc7609bf0c562101067382dc668502209f7df3b34696ca1b6c76cffca2dae69e
font_01_sfnt_off0000e0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 10736 bytes
SHA-256: 244673c9b233ee2ab637c27c357cfc2e8c8122054a21a7c9af936a43e6c94cb3

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