Malicious PDF — malware analysis report

Static analysis result for SHA-256 d371f8eb3bd86a2e…

MALICIOUS

PDF

78.5 KB Created: 2021-05-28 22:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88426052ca3a1406c71b45a2e4732e40 SHA-1: c20d7e3c148953776465fdddfb468edb06c5fd3e SHA-256: d371f8eb3bd86a2e897a7196656deea3e138ad58b76039d9b63a0513aa81f412
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers 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. The document body, though heavily obfuscated, contains references to 'Cartoon Network arcade app', suggesting a lure to entice users to click the malicious link.

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://botokaw.ru/123?utm_term=cartoon+network+arcade+app
    • https://cdn-cms.f-static.net/uploads/4376369/normal_60614d391d93d.pdf
    • https://cdn-cms.f-static.net/uploads/4446490/normal_600eaf7473b6a.pdf
    • https://cdn-cms.f-static.net/uploads/4417145/normal_6064ffdbe6c98.pdf
    • https://cdn-cms.f-static.net/uploads/4485930/normal_6019a16fa078e.pdf
    • https://cdn-cms.f-static.net/uploads/4419412/normal_604ffef779acd.pdf
    • https://cdn-cms.f-static.net/uploads/4375196/normal_605f9e9ef3429.pdf
    • https://cdn-cms.f-static.net/uploads/4393044/normal_606b9e9f59287.pdf
    • https://cdn-cms.f-static.net/uploads/4475219/normal_60681f0518d82.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f120a0b1-31d5-4717-a869-8d3a3ff0fbeb/rutidulururubuv.pdf
    • https://uploads.strikinglycdn.com/files/21c95874-a503-4f1a-9cb4-1464009e0aff/95528935492.pdf
    • https://uploads.strikinglycdn.com/files/a595ed92-731b-4ba8-958f-53d364901e78/16674057095.pdf
    • https://uploads.strikinglycdn.com/files/ef230cb3-fe44-46a8-975e-caa85777c245/dd_3.5_fillable_character_sheet_excel.pdf
    • https://uploads.strikinglycdn.com/files/9c31e26c-c3db-40de-b0a4-13b6726463eb/44434248026.pdf
    • https://uploads.strikinglycdn.com/files/66c0b1cf-ad15-44a2-85cd-fe051af2cd5f/76081621896.pdf
    • https://uploads.strikinglycdn.com/files/4ecce0fa-7d9b-4458-8f96-6bb8d1d665e0/kowimidipimigisujetez.pdf
    • https://uploads.strikinglycdn.com/files/add9db24-006d-4cfc-825c-c0bff5061061/how_to_reset_amana_microwave.pdf
    • https://uploads.strikinglycdn.com/files/163e0dd7-abfe-4dc1-a98a-c67903dd89a6/futefevevijem.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_off0000f51c.bin
31a4ead50d939832f92adbc8cdf0a9f86859cbb492a8f392479ed896cea2f143
pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 4920 bytes
font_01_sfnt_off000105fe.bin
080b51a9f95d6b536415db416abaf3c41a183dea1f7be4836a468ebca88760ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 11520 bytes