Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3b892057fbc2b1…

MALICIOUS

PDF

71.0 KB Created: 2021-03-27 11:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ae140698a50cd434f3db16d310b7f1d6 SHA-1: c551942fdb3617d9ee1cd447e603cfbae0edad97 SHA-256: 5d3b892057fbc2b16ffe47a78387f8fc561e9b6df462a0ec67d52a5506c0dc0f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=logic+gates+pdf+notes PDF link annotation
    • http://copyright-infringement.business/96804520985a7djz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480170/normal_5fca224aa7105.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/gatutij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_603fb32030dea.pdfIn PDF document text
    • http://boothattendant.com/dimam6674d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370288/normal_5fe54318ccb06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377095/normal_5fed93cfb8a5e.pdfIn PDF document text
    • http://sayseedokg.com/nedetagipadigedobanavibtk24y.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/juruzowudubulifibixo.pdfIn PDF document text
    • http://mazanatur.space/jenimuj96by.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_601cc0ffaaa52.pdfIn PDF document text
    • http://am-sound.ru/9875934022121mam.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/soduxeximukebosat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5ffe851accd3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_b85508238b6f43d89469c954ba9edd8d.pdf?index=trueIn PDF document text
    • https://6ada6c45-9e8d-4063-9633-40b9e375d9b0.filesusr.com/ugd/9a7afa_e6b0a4c85a044ad4a285607721a723bb.pdf?index=trueIn PDF document text
    • http://liroporuki.myartsonline.com/jirejotizubidemozawumafuk.pdfIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_8de9d6990d0142888b7619c087e0134d.pdf?index=trueIn PDF document text
    • https://f3b86e06-b3aa-4ee1-82f7-79049f3379a8.filesusr.com/ugd/0c4fd2_8063f5a2e1434a5d8c76ec8605a62f49.pdf?index=trueIn 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_off0000d841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD841 5136 bytes
SHA-256: 8fc4db9d2da4b1e3fe9f45c0608aca8b49ace237c8c580bd3a077628d7751c0b
font_01_sfnt_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 10916 bytes
SHA-256: f17bb61dfe2d3437adb02f433806865ace3bf1daaf6d55982e60e41c5608835a

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