Malicious PDF — malware analysis report

Static analysis result for SHA-256 3736a68cd782b172…

MALICIOUS

PDF

74.4 KB Created: 2021-02-24 23:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c6e67a19ed17cad28bf063226a632b35 SHA-1: d31e363388f6ff78bcd27e21f67b0d9d5e4808de SHA-256: 3736a68cd782b17212b0819c607ac7d710f7fcba081bf7c9d3bcbd97c4e6ba91
104 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=what+letters+make+the+long+e+sound PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5febb8da181c7.pdfIn PDF document text
    • http://auto-agents.space/reflector_3_crackhloj0.pdfIn PDF document text
    • http://static-get.top/castle_clash_secret_codemu10w.pdfIn PDF document text
    • http://lasns.fun/xogusonukebcqp99.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/gdiha74/duetto_ato_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5fe0bdce1b83d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5fd9c068beb22.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/WbrheS1/46810276716.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/ia2xgfw/draw._io_desktop_app_download.pdfIn PDF document text
    • http://satofaxa.iblogger.org/how_about_your_family_answer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408706/normal_601b8a2ae1e2c.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidevepip/igVTcig/carpentry_tools_and_equipment_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/ieAhb0U/kiki_s_delivery_service_costume_diy.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_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 5316 bytes
SHA-256: 9c9355bbd126fa3e6d9ccf568d929425f58d7101aa4938a8a39942d68cb52f7c
font_01_sfnt_off0000fa0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 10096 bytes
SHA-256: 3131182816b898f760cae5f1cd53a48338a47242c77e721729a926c113f63dcc