Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4a4412fe0a8cd4…

MALICIOUS

PDF

71.6 KB Created: 2020-12-22 16:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5abf5e96931737b22856a168cff0e144 SHA-1: d677f19d20725978449bd4b28de1bb16b9c15371 SHA-256: 8e4a4412fe0a8cd4218220e1923aaadead6df7ddb1b131078e048e118b5ffba6
96 Risk Score

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, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to chemistry, suggesting a targeted phishing attempt.

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://traffking.ru/123?utm_term=imine+and+enamine+formation
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/lerunodejokawuloner.pdf
    • https://cdn-cms.f-static.net/uploads/4393033/normal_5f92706a463a3.pdf
    • https://static.s123-cdn-static.com/uploads/4443610/normal_5fe111079a725.pdf
    • https://gipuwibozomaz.weebly.com/uploads/1/3/4/8/134891778/9106117.pdf
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/fozexakatu.pdf
    • https://cdn-cms.f-static.net/uploads/4464529/normal_5fb4aff542271.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nimuwet/laxowarudazaxunajiguji.pdf
    • https://static1.squarespace.com/static/5fdfeb28c66bff209e82f62f/t/5fe0205191828d0f5d70c0e3/1608523858369/webuperakegukixi.pdf
    • https://static1.squarespace.com/static/5fc79565504bb4653ce62487/t/5fcac90076b5484ec15add02/1607125250706/pulse_secure_custom_login_page.pdf
    • https://s3.amazonaws.com/vuforewebub/benchmarking_o_que.pdf
    • https://s3.amazonaws.com/ninasivol/busuu_apk_mod_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db5e.bin
f6ae66eba1c70d167b1a0bdfadeb5f3437f4e2a6b5456793c2c741c16a11cd20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5E 4780 bytes
font_01_sfnt_off0000eb89.bin
3584b95ddc50c5896823f94f796d4deb27d8d66e845ebf8bbd499b20d9a9e43b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 11260 bytes

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