Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b735bf64341bd06…

MALICIOUS

PDF

71.0 KB Created: 2021-01-04 02:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d9930c07b4b9d8cde1613f2ecccb7914 SHA-1: 88c2abd4de3bb957d8ee282ac5d1228730520a1d SHA-256: 1b735bf64341bd06f3e6886f5e3b4c87d9a606a4222c2caec62f5da3a8cec12d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a domain associated with phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious website.

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://trafficel.ru/aws?utm_term=costing+template+word PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5fb9cf857d223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5fd8baa7cc3bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5f971e667e96c.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/xjfjiji/24384815722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409619/normal_5fc601c73a768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_5f9387679c69c.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/ceaicjh/61983430945.pdfIn PDF document text
    • https://cdn.sqhk.co/bejadelu/xnhhhja/baby_shark_birthday_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/gQghPge/color_by_number_coloring_productions_activity.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/FhiTPij/magic_tiles_3_theme_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5fafe9d828ae0.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/ijibFoE/fizozolivoxifisaxubuzof.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/desenaz/duxejegelarunujigawip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a4f8e01-3442-4187-ab1e-f69f844de272/smartthings_hub_v3_vs_v2.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_off0000da3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3E 5276 bytes
SHA-256: 1dd5936b2ede8e2db001ee9e640d2192518cb12b8df2b25383538b0e2921ab59
font_01_sfnt_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 10404 bytes
SHA-256: 1626d901c7fa5d73a00088c377fa039787985543bb49a20bed8c40c68522f15a

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