Malicious PDF — malware analysis report

Static analysis result for SHA-256 518b12d804c587cb…

MALICIOUS

PDF

47.6 KB Created: 2021-06-08 20:56:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f86e53df143f20a6a87c56426fdeb853 SHA-1: 2402eb070bd642aa341a99300373853675730533 SHA-256: 518b12d804c587cb06f7765833319baa644b3219bb09b45672130201530e08e1
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 0.9832

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.tw/app/431946152/free-robux-22k-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.tw/app/431946152/free-robux-22k-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-scam_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-link_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hacks-for-coin-master_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_004_off00005299.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5299 30872 bytes
SHA-256: 474c3354dd022ce76f2ded007ff68c74d15040154e995333d9e40d01d5a09c5b
font_01_sfnt_off000097be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BE 18308 bytes
SHA-256: cb5ecd87480405e34224d24ce6455ee0c59c9f118caac6998f60bd94e62acdd2

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