Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeafbfc3bdf03222…

MALICIOUS

PDF

76.3 KB Created: 2021-01-21 09:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5e68df8424388a3d9768146f2f2c32f3 SHA-1: 22839b7305b80055611539e55c44d019c0b99ddf SHA-256: aeafbfc3bdf03222a6627268e13b7774f212bc31ca3cfaaad9575591e1606b2a
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 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely used to redirect the user to a phishing page or to download a secondary payload.

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
  • 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://crophysi.ru/123?utm_term=happy+birthday+graphics+funny In PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/riddles_with_answers_hard.pdfIn PDF document text
    • https://site-1172122.mozfiles.com/files/1172122/amlp_stock_dividend.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369763/normal_600920748c9f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492580/normal_60029189b8dc8.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/hgh85ge/basketball_3_point_line_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/bgiCwib/zenufuturum.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
    • http://fojamemu.epizy.com/69056632543.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/caller_id_lookup_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/vojowena.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/aryabhata_satellite_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/80632058128.pdfIn PDF document text
    • http://puguvapalovuzub.rf.gd/bosch_professional_glm_40.pdfIn PDF document text
    • http://gorevifero.epizy.com/international_calling_wifi_android.pdfIn PDF document text
    • http://vupikefugogulup.epizy.com/audio_song_marathi_dj.pdfIn PDF document text
    • http://setuvufijub.epizy.com/hiv_aids_treatment_guidelines.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_off0000df65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF65 5244 bytes
SHA-256: ebc951050c77a2c41fa4b05ff45e32c7f8b8fea6bfe917f0a3af4d509f44fcbd
font_01_sfnt_off0000f122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF122 10780 bytes
SHA-256: f0dfe75702a78d8ddcb759fc555ff4ba2f157199d7dfd3fcadcf006fc15b56da
font_02_sfnt_off000115d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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