Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d87fc35e169473c…

MALICIOUS

PDF

76.3 KB Created: 2021-02-05 15:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a2307c55887b184600fe613e1cc65f2b SHA-1: 9c4373652989ffed41be905130dfe23176753c65 SHA-256: 8d87fc35e169473c7d7e29920ea77c05e2b20afed6717cd65db2106ddfbfa2ac
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI that redirects to a URL, likely as part of a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests the document is designed to trick the user into navigating to a malicious site, potentially to download further malware or engage in credential harvesting.

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
  • 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://bologen.ru/123?utm_term=when+will+tickets+be+on+sale+for+avengers+endgame PDF link annotation
    • http://my-favshop.online/vopasewidaguvwk1kk.pdfIn PDF document text
    • https://cdn.sqhk.co/jevikepuja/HDenhgx/red_balloon_company_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fd16579a2628.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428078/normal_5feb18ce8170a.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/ahegixP/microsoft_managed_home_screen_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_5fcf661b7723d.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/ha1jeii/79067938878.pdfIn PDF document text
    • https://cdn.sqhk.co/gizulakofo/gehejh1/menajenizavujatinutikin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_5ff871f80a870.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426549/normal_5ff98ae5d5a26.pdfIn PDF document text
    • http://dompodklyuch.com/14176087621lm0u3.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/nbme_psychiatry_form_1gso5v.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/hbjfhi0/57529031287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5fe721221fbd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450628/normal_5fe09c0f52bf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449600/normal_5fd65bc29b448.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479433/normal_5ff9e3c7cdf64.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_off0000ea97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 5804 bytes
SHA-256: 5320167821861bf23b5e7b4e3e7f163e00f34cfc7743427cc27b39aa987b04b4
font_01_sfnt_off0000fe54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE54 10928 bytes
SHA-256: a5404d10b9f1d69976a63c3d7c304354e270ecfdda78b7f41d2343e9428cddce

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