Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a65982a9441c13…

MALICIOUS

PDF

74.6 KB Created: 2021-02-24 05:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e4adad263fbf0b97e5741fca1ee1577e SHA-1: a7f8b798bd8536098fda3ca6ac675c7c47d9806e SHA-256: 81a65982a9441c1334ca1f362acb5bc76b77db60c74ab4713acd5b0a4a6256af
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The presence of the SE_INVOICE_LURE heuristic suggests a phishing attempt. The embedded URL, https://leonvi.ru/123?utm_term=the+fallen+hong+kong+movie+2019, is likely the malicious payload delivery mechanism. No scripts were extracted, but the PDF structure itself may contain malicious JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://leonvi.ru/123?utm_term=the+fallen+hong+kong+movie+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5fe0d05138245.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/CLifWpz/hakuouki_characters_relationships.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_602796d44a959.pdfIn PDF document text
    • http://xubaseki.iblogger.org/report_fake_apple_email_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_600ed3e45eaa5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483586/normal_5fde8f5d6d4f7.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/hGrEjjl/toxegugagemavibezuwumiba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530151/normal_5ff2732776c35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5ffb725f4402a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5ffe66f890e32.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/jie4ohs/zasetiwolajufar.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/ggialib/45422898450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wupixufekijax/72697890565.pdfIn PDF document text
    • http://teboseru.rf.gd/17221149812.pdfIn PDF document text
    • http://nanesipub.rf.gd/bedazzled_platform_heels.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/26795590060.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D1 5168 bytes
SHA-256: 63b1d32053c23161edf7d3edc1065ca81b18e7226ce147dbdc9ecc7de26a2cd5
font_01_sfnt_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 10840 bytes
SHA-256: cbf963ffdedd2c418be1970b468085d4c9dbd5d6bf7488d7263910ef0a04694b
font_02_sfnt_off00010f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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