Malicious PDF — malware analysis report

Static analysis result for SHA-256 8399bda0e1c7d9c8…

MALICIOUS

PDF

154.3 KB Created: 2021-06-10 09:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ef52209b4cb3bbcbe16a59f28373591 SHA-1: 2124b7a1d2a529e2eea41797ea1f472de32d0226 SHA-256: 8399bda0e1c7d9c876c2d743b50503b74ca0c7b6cc2982da238fc127b41e6bc2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 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://queure.ru/pbw?utm_term=fnaf+1+free+ios PDF link annotation
    • https://gubotejulide.weebly.com/uploads/1/3/4/3/134380330/31f96a4e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_604e165f9f8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_606c91eae63f1.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/mimimupaninixof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_60530d98b7be0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_5fe90d3d5b6ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369656/normal_5ffb12547a969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_5fd7b5b845768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5fdb63ae962c9.pdfIn PDF document text
    • https://taketelufi.weebly.com/uploads/1/3/4/7/134745639/pinitewak.pdfIn PDF document text
    • https://mulaxenowaw.weebly.com/uploads/1/3/4/8/134862071/zowolipepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_6065d3fd903ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458161/normal_5fdf23516b78c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503390/normal_60253d832010f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/368e2c53-fb6b-4285-9622-ee9c5e093250/how_to_break_down_a_bersa_380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113b106d-0542-4136-8cd9-7ec6c2920b2e/16835380400.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_off00022176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22176 4736 bytes
SHA-256: fa1fa7f56e1bd65898159fdb49c2374a62188fdf8cd235eb95235c76ebd4f3cf
font_01_sfnt_off000231a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231A7 13108 bytes
SHA-256: 7a6f924c24ffcbf08c19d6dd14ad5b4a23f29468dee69f5c8c8dc86a6d355a31

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