Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a05872b5f1f008…

MALICIOUS

PDF

38.2 KB Created: 2021-05-22 11:58:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 60b219aef9d65a67df3d3033509f932e SHA-1: 480af6bc637af904d064b3c6edf5ebeacb743746 SHA-256: e1a05872b5f1f008a86ce27fb26bc36c31f81a8a236b3f5f0b2ca1642a728998
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/roblox-speed-hack-game-hack.
  • 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
  • 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://netcdn.xyz/app/431946152/roblox-speed-hack-game-hack PDF link annotation
    • http://schmittmusic.de/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/pubg-770-uc-ne-kadar_GM1330123889.pdfIn PDF document text
    • http://schmittmusic.de/images/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://schmittmusic.de/images/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003510.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3510 27284 bytes
SHA-256: dedf9685aaff33a852ae3123fcdab18ed72d6e8fc6846a08f9c638b1e53287c0
font_01_sfnt_off00007357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7357 18532 bytes
SHA-256: ecd25e1cae784267f5a646f1b70b1ce742945d3ce40e95dc5b3aacf46c412aa4

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