Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72efd16ade86c7a…

MALICIOUS

PDF

71.2 KB Created: 2021-02-23 20:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1e4883957571b944d54bd60c906ad107 SHA-1: 96bf07bebbde339fd02eb724343d1e9c440dda4a SHA-256: d72efd16ade86c7a721fca61d5b72b1d5c489aeaefc0f24dab75f6869ab12f5f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as an external URI pointing to 'jottigo.ru'. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest it's designed to redirect users to potentially malicious sites, likely for phishing or to download further payloads.

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://jottigo.ru/123?utm_term=husqvarna+128ld+carburetor+rebuild PDF link annotation
    • https://cdn.sqhk.co/lobinazema/hVFqBKf/migazeluxuropug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379035/normal_60085cdb746a8.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/gfig3ic/skyward_misd_mesquite_tx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421330/normal_5fe1b15ccde2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_601bb9129eba6.pdfIn PDF document text
    • http://civiliscmq.online/High_school_musical_1_film_complet_ybzhvf.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/jcTJifB/89541980330.pdfIn PDF document text
    • http://ighelpcenter.xyz/80375017170dy581.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/gd2jfie/overdrive_premium_game.pdfIn PDF document text
    • http://expressvpn.store/cidco_format_aswsfc.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/ghbhey9/ruxutofojexipezojot.pdfIn PDF document text
    • http://promooffer.site/cia_agent_action_movies85o8p.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/j1Ha3ij/samalofunofumifadonijikig.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/cicqxha/browser_minimizes_itself.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5fd8d06d17bf2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD914 5600 bytes
SHA-256: b7721c2417cc28d0a2cb41628d50ffd5ceacbb8dbe85a0d581104e0a89a91e3f
font_01_sfnt_off0000ec28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC28 10288 bytes
SHA-256: ae5a31013af31d39946c11baea25fb5e96a51a1c0e8cafe67f87ee317990eb5c