Malicious PDF — malware analysis report

Static analysis result for SHA-256 421364d955f1eafb…

MALICIOUS

PDF

109.1 KB Created: 2021-01-16 19:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c62a8993101d74123e245ef97ce42c50 SHA-1: f6cd45900680aa6487a816f651b94248bf2c6f56 SHA-256: 421364d955f1eafb5e7d8c20f89e3cfab61060acf3e68f1a1ba1d293e39087cb
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely for phishing purposes. 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.

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://traffnew.ru/123?utm_term=edipo+rey+resumen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5f8f336a7ec03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5fa6e83d1832b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5fc55e9e7fb5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455198/normal_5fadab7d6157d.pdfIn PDF document text
    • https://xajapeni.weebly.com/uploads/1/3/4/3/134341300/2198736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492294/normal_5faaf7d935615.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496013/normal_5fbbfab6eb14d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5f96c71e28da0.pdfIn PDF document text
    • https://miwevedadig.weebly.com/uploads/1/3/1/4/131437981/7013839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476756/normal_5fe1265b96e0b.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/jfBiihj/black_beauty_book_trailer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384029/normal_5ff8b54120603.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/regegozumekoza/89667294711.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/coraline_movie_watch_online_free_no.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_off00016a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A60 4924 bytes
SHA-256: 1b2d034de291cd608e01260ff130e08b3320d537b4296251f076898cc8bb7510
font_01_sfnt_off00017b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B18 13236 bytes
SHA-256: eb6dfa15963845d23293738bd9c8115803ba6ec3a5cc6f68356513226c7411cc