Malicious PDF — malware analysis report

Static analysis result for SHA-256 495252a33b672ff9…

MALICIOUS

PDF

80.7 KB Created: 2021-01-31 14:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 310a4a5c40637f1da4cef9b7667cdbab SHA-1: 6e4592b796d85511c67d459cf73f3bf9b2c6f01a SHA-256: 495252a33b672ff90e2ff0f3310584cfe84ec3c2336c2080a840641fa32e08e3
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that points to a domain associated with phishing or scam content, disguised as training topics. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wb?keyword=leadership%20skills%20training%20topics PDF link annotation
    • https://cdn.sqhk.co/betewulo/hcgigiS/kaxijewepukotaz.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/vujajibojuvesebe.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/heJNIXL/80483184708.pdfIn PDF document text
    • http://look-hotel.com/23191162752c01u7.pdfIn PDF document text
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/doporep.pdfIn PDF document text
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/bbe7164f.pdfIn PDF document text
    • https://cdn.sqhk.co/netomivoku/Zghgefz/9092976200.pdfIn PDF document text
    • http://antonioita.fun/kpss_nlisans_matematik_soru_bankas3zd8p.pdfIn PDF document text
    • https://cdn.sqhk.co/jomenuluz/gcibSif/37202017336.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/laradusa/fuzexikerazinij.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/google_sheets_query_importrange_multiple_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/78121178829.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_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 5128 bytes
SHA-256: a4759cec7442bbd28d4bac130a070da3b66cc5b80d18153a5f1e9e30f785f22e
font_01_sfnt_off0001019b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 10900 bytes
SHA-256: 9bef24faddd3476a1be531c365e5efb7fa7e6ce1f47a2bbeea7c60d6639934bf
font_02_sfnt_off00012678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12678 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3