Malicious PDF — malware analysis report

Static analysis result for SHA-256 521921f6ed34af4f…

MALICIOUS

PDF

41.8 KB Created: 2021-05-14 21:31:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dcb8da96395c08e895e57e495240f216 SHA-1: 1fa1d07c1b9ac2309c574028a43dbf0936d5872e SHA-256: 521921f6ed34af4fde9b113ab2f1306ef486637e9aff00a4ba408dd749833c18
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/websites-to-get-free-robux-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/websites-to-get-free-robux-game-hack PDF link annotation
    • http://shootawayproduction.com/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://shootawayproduction.com/images/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://shootawayproduction.com/images/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://shootawayproduction.com/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://shootawayproduction.com/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://shootawayproduction.com/images/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://shootawayproduction.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://shootawayproduction.com/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://shootawayproduction.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://shootawayproduction.com/images/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://shootawayproduction.com/images/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://shootawayproduction.com/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://shootawayproduction.com/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://shootawayproduction.com/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://shootawayproduction.com/images/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://shootawayproduction.com/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://shootawayproduction.com/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://shootawayproduction.com/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://shootawayproduction.com/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://shootawayproduction.com/images/free-robux-real_GM431946152.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_off000048ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EC 24888 bytes
SHA-256: 5722aefd04aecb9846e743b46f42bec0ed402b4e71da06a1e625b4d7bff68fbf
font_01_sfnt_off00008094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8094 18436 bytes
SHA-256: 6ab9ab31980840835fbaeca164a74f0e8188db39a6ce5c5e4face3e95ba0b523

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