Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23417924f24d398…

MALICIOUS

PDF

67.2 KB Created: 2021-02-25 20:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d4a35bbdcc14b8d7d0b0fe0b5a129fac SHA-1: a62a094a19c62740f096880e0a8eb90967ad0ef0 SHA-256: d23417924f24d398a5fdc15a8ad9483d0f5a6805add6ff6798a421416b650263
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

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://druttle.ru/strik?utm_term=shakespearean+insults+powerpoint PDF link annotation
    • https://cdn.sqhk.co/nugopanage/hiUrije/galaxian_nes_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_601a0790ce564.pdfIn PDF document text
    • https://cdn.sqhk.co/madobeborozu/iigqhXV/top_100_station_radio_frequenz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_602ef897ce486.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/hggcqBa/58770302299.pdfIn PDF document text
    • http://nutigunejome.22web.org/67773426417.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/cjfuhjM/vusavenuleduvimom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/royal_mail_envelope_size_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/83311009875.pdfIn PDF document text
    • http://vifikuvikepavad.rf.gd/intrinsic_and_extrinsic_motivation_worksheet.pdfIn PDF document text
    • http://wasaxotudulolo.epizy.com/74146290133.pdfIn PDF document text
    • http://rawarawoxegig.epizy.com/children_s_books_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/losadavebiju.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB35 5168 bytes
SHA-256: 561cc3204981b07ddc950e4b9468a873a5917ff37b041566088033ffe1f11959
font_01_sfnt_off0000dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 10372 bytes
SHA-256: 6f9958b3c093ee319d408f4ea9c2321647c6415370784e3c870c56d45f1b806c

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