Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59b9781a6440eeb…

MALICIOUS

PDF

73.6 KB Created: 2021-02-20 16:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a333f5459695890c8351b74ed33610d4 SHA-1: d43b3b6326736b56c48fd05c29d30298f531e747 SHA-256: d59b9781a6440eeb3c6a31772f9b5709d435c64a8dc2d9f745e9adbe2687253c
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 embedded URL is designed to trick the user into clicking it, likely leading to a phishing or malware download site. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

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://yafferge.ru/strik?utm_term=how+to+empty+capsule+container+nespresso In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_5fd888c42bc3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5ff239ea15caa.pdfIn PDF document text
    • http://zagafen.iblogger.org/bitdefender_total_security_2017_free.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/zesotat/tebudobuf.pdfIn PDF document text
    • http://tinafominur.epizy.com/segozuza.pdfIn PDF document text
    • http://toxerisana.epizy.com/midabu.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/informe_de_auditoria_administrativa_caracteristicas.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/pathfinder_brawler_strangler_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/getelodofijanafufujob.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/yg_entertainment_online_audition_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/bukhari_sharif_bangla_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/canon_600d_manual_video_exposure.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/22950532450.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_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 5116 bytes
SHA-256: e1acf54afd6bae81afd1e64f01010f0744b00a7b2637778271539e3d025361d4
font_01_sfnt_off0000e75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75F 10500 bytes
SHA-256: c066dc497192261f83978a0344ed1556fe911a250228b4e87dfa3bc7f8b47c5a
font_02_sfnt_off00010b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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