Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd593a469f145b4…

MALICIOUS

PDF

40.1 KB Created: 2021-05-12 21:37:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 390b8a2aa856547cc3e0c3c7e2947345 SHA-1: 4595c18d06b98a036094b2b6a53260eb0c15b40b SHA-256: dfd593a469f145b47c202eb4d0be9576c214eab8bc7e5b48c7acc931940b63a9
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 0.9971

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-rape-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-rape-hack-game-hack PDF link annotation
    • http://revival-gang.de/images/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://revival-gang.de/images/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://revival-gang.de/images/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://revival-gang.de/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://revival-gang.de/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://revival-gang.de/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://revival-gang.de/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://revival-gang.de/images/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://revival-gang.de/images/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://revival-gang.de/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://revival-gang.de/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000425d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x425D 24368 bytes
SHA-256: 2e26cece86935fcf8f332a4cebe4454d99e43cf554f6ec0204999fd16fda5387
font_01_sfnt_off000079f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F1 18356 bytes
SHA-256: 8a1fe0c7231104fca4fa627868bae52978e90e92fc8d209bfe3611444447d27b

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