Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd10319d8260882…

MALICIOUS

PDF

66.5 KB Created: 2021-01-09 03:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ad82356973e40b03a51f64459f4aec17 SHA-1: 0f0e41c42fbe7565a833403792c90fbc99599b78 SHA-256: 5fd10319d82608822ccc4a70750fbd40384d04057038d33effe259673a5d8570
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://traffking.ru/123?utm_term=solstice+of+heroes+2019+eververse PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6b1f55-74f4-4660-be8d-663e61e61c2f/54749684361.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/78272576696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563e3041-7625-43f1-963c-78a97826f823/51941647821.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/bubble_game_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/inter_company_transfer_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/xakutabigafaterutabigub.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/kipuxox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c41e2a5-890f-4121-a570-262d9a7833a2/xewafefuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdafac2e-6473-4a00-abf4-e42218d24ce7/xupezi.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_off0000c6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D8 5404 bytes
SHA-256: 9ccf2a5662ec847fd4d99b42c4ccc903b15701f4a3159d74f92e5720e878722a
font_01_sfnt_off0000d93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93F 10692 bytes
SHA-256: fcde0703f18e419ce26d1843eda22548e17c809a7136e1dbd0fff3e1c008e943

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