Malicious PDF — malware analysis report

Static analysis result for SHA-256 112f3e00d678a6e4…

MALICIOUS

PDF

73.5 KB Created: 2021-01-03 22:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02913bb87c860063b9ef7746673c275a SHA-1: 72061d3149c613ecc31051f4ef4032ab0979e837 SHA-256: 112f3e00d678a6e4de7b110347e75fdbe8ea3fea3381ee009d71cebf70a570a7
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 disguised as a product advertisement. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, potentially to download further payloads or harvest credentials.

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://traffine.ru/123?utm_term=wood+tool+box+kit
    • https://cdn.sqhk.co/xewimoziwuvo/jaFhfd2/88395796441.pdf
    • https://cdn.sqhk.co/losokifape/hfWTGie/33404445821.pdf
    • https://cdn-cms.f-static.net/uploads/4401989/normal_5f91e02391690.pdf
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5fdf97bf988ef.pdf
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f9d7bf3efee1.pdf
    • https://cdn-cms.f-static.net/uploads/4383156/normal_5f8d739f8a93c.pdf
    • https://static.s123-cdn-static.com/uploads/4412394/normal_5fc63e447b543.pdf
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5fde5652570de.pdf
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fe7488fb2920.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d0f9c379-1cc5-4aeb-89c3-4a11c7dabfed/80979833502.pdf
    • https://uploads.strikinglycdn.com/files/964ccb30-4203-4195-87cd-22a269aba386/5605576257.pdf
    • https://uploads.strikinglycdn.com/files/c3ae3a9d-ba57-4bf2-99a7-a77d30b1209b/gonuwezadolivevivoxok.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_off0000e570.bin
ec506c80aa4c4e039749a56506a9787efd4d3a1e2fac5996922734a44cb95a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 4620 bytes
font_01_sfnt_off0000f54a.bin
3c3dd6073eaaf342530b7ac741c651e651d6fb3890e5060a657a9d020c05dcba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 10644 bytes

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