Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76191597feb13e7…

MALICIOUS

PDF

75.4 KB Created: 2021-05-22 07:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 752a80a1777c5f66aca9ed4905673c9d SHA-1: 1377438eb06716783b9ac9d8b7bcf7789d998c4c SHA-256: d76191597feb13e76b3eb714192dfb412c7a62b03a2e31ea1ab86548761bf010
104 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to resetting a Viessmann boiler, suggesting a lure. The embedded URI `https://xezojetit.ru/strik?utm_term=how+to+reset+viessmann+boiler` likely serves as the malicious payload delivery or phishing endpoint.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=how+to+reset+viessmann+boiler
    • https://cdn-cms.f-static.net/uploads/4481518/normal_6042ddbc7b83e.pdf
    • https://static.s123-cdn-static.com/uploads/4379498/normal_5fe289634b26b.pdf
    • https://cdn-cms.f-static.net/uploads/4452595/normal_6044fd2fc1513.pdf
    • https://cdn-cms.f-static.net/uploads/4391024/normal_6015ac8ca92cd.pdf
    • https://cdn-cms.f-static.net/uploads/4446931/normal_60478b2136d33.pdf
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5ffcbf40b553e.pdf
    • https://cdn-cms.f-static.net/uploads/4416125/normal_60604d2f6e9f0.pdf
    • https://cdn-cms.f-static.net/uploads/4482870/normal_603a0c72eec8b.pdf
    • https://cdn-cms.f-static.net/uploads/4383571/normal_6026e6059f87b.pdf
    • https://cdn-cms.f-static.net/uploads/4478667/normal_600ab737dd3df.pdf
    • https://cdn-cms.f-static.net/uploads/4412900/normal_5fdae908308f2.pdf
    • https://cdn-cms.f-static.net/uploads/4370989/normal_602650434cefc.pdf
    • https://cdn-cms.f-static.net/uploads/4387577/normal_6065ac0a57bff.pdf
    • https://cdn-cms.f-static.net/uploads/4455185/normal_604969c37adda.pdf
    • https://cdn-cms.f-static.net/uploads/4408862/normal_604ccc2c133f7.pdf
    • https://cdn-cms.f-static.net/uploads/4497109/normal_605073b68eef3.pdf
    • https://cdn-cms.f-static.net/uploads/4479223/normal_600e147374c9a.pdf
    • https://cdn-cms.f-static.net/uploads/4455884/normal_60153804e889c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pulujolatepuv/flutter_template_builder.pdf
    • https://s3.amazonaws.com/kabisebax/96781519944.pdf
    • https://s3.amazonaws.com/wolina/casio_unisex_digital_watch_f-91w-1.pdf
    • https://s3.amazonaws.com/kelageketisefuv/sudofowinumek.pdf
    • https://s3.amazonaws.com/verirejon/mifojode.pdf
    • https://s3.amazonaws.com/lerezazo/zogabovesilibidukajozado.pdf
    • https://s3.amazonaws.com/lebaxa/nivepuv.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_off0000e931.bin
9dd729d4d9caccc0384b5dae7eea9509370db436e54b1e1cad5432893341d58f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 5084 bytes
font_01_sfnt_off0000fa76.bin
ee4bc9612c9ab0d4711009f3eaca60a16d80bfe764855bdaeacc598c751a691a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA76 10956 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.