Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4bf59bb16fb3b1…

MALICIOUS

PDF

71.2 KB Created: 2021-01-08 06:52:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3f8ff46b4bf62b9e4c6ab519ae425dd1 SHA-1: e7a941faee5d337a15c44d26535c9bc80a120cb3 SHA-256: ce4bf59bb16fb3b196fec59f274f287c88e2f123c30b88c4d18466cf3d52978a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, potentially as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=top+pediatric+gastroenterologist+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464319/normal_5fb7614f65a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489402/normal_5fe98050b864c.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/eUgdAmU/barutowukumurixaduleva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454544/normal_5fc0515a34ef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5fa76cab974d6.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/ggdR2RR/86568705560.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/nonabafat/15084418727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2695878-2be7-4632-97f3-932fbada23ee/niwigubofano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37db9c9c-e3d0-4fea-92a0-1c352b00b98b/xidarinutojajenikij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082e56e9-ee6f-4c57-a770-4e1f8faea174/tiwegosobavev.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/radilixeguwadopuzuloxumoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74075dca-d946-4b77-b0c8-2f94f01c594c/vupog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2a39db-8049-4942-a5bc-6ca6ab43ea25/selikif.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_off0000da39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA39 5340 bytes
SHA-256: 0fb9eea560953069d448a609dc4f4304a8087b9709a1262f03faff9f1e61fce1
font_01_sfnt_off0000ec50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC50 10616 bytes
SHA-256: ff8aea5fcbc48033227c7d44b58d4e8b3200989ae4e18b81e70e69ab7ff251e9