Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24ab7f87e2fe63d…

MALICIOUS

PDF

73.8 KB Created: 2021-01-09 17:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 370631810ce20de654bfcfaba38f70cb SHA-1: 1d9a0b3f5fbd983f39e02acda9b4173268023bc8 SHA-256: a24ab7f87e2fe63d80d565538ee0650e1325a8cbce28996909d8f189a5b462f0
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through social engineering.

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://trafficel.ru/123?utm_term=horsepower+to+joules+formula PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403130/normal_5fe304a2850dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495975/normal_5fae0c433eb09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496225/normal_5fabc133b257b.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/898c977c-6ecb-4d2a-b61d-cfa12577b403/23799769765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57437cee-43a5-4af4-b7e3-e4b5a07fc2ea/58745861252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c950a90f-e987-44c3-b180-c729bc35896e/gixutukire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74b0ff2-5940-41f5-a760-b56a842021fd/directions_naples_florida_to_fort_lauderdale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b88ff3-51b9-4a4b-87d7-a50d4b50d199/12212912767.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/gold_brick_guide_lego_marvel_superheroes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eb685e-cd6c-49fb-b2c7-a90f158569c5/rank_makers_ring_light.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/pewufijefese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed273ca9-c904-43a3-ba5e-52afef0023f6/kipufariduweno.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_off0000de13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE13 5176 bytes
SHA-256: 9467f68d33b9e6096ce05c98b4c9bb91fa9c6f0e082cfe4b5de952325e73c72f
font_01_sfnt_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 13192 bytes
SHA-256: dfb4a9c455824b167b5c3c9fdf82a37003d5a19d7f565125d79e411dea7965a9