Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a2e97f6b5e8061…

MALICIOUS

PDF

49.7 KB Created: 2021-05-12 18:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: eaa94984dba846c71b93b223d1b99de7 SHA-1: abf646a9b13cbfdedd5f1cf8c49ec8fec1cfc00a SHA-256: 48a2e97f6b5e8061c0da051856d689ffc11a04f3667f620fb5a1a9f4910450ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier also flagged this PDF as malicious. The embedded URLs are designed to lure users into clicking, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/get-robux-com-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/instantrobux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-game_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004857.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4857 26268 bytes
SHA-256: 2d0e5ae341f6b905fafa06e922e43226aa1296bd0895bcdfea609fe9fb5606a1
font_01_sfnt_off00008605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8605 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000092a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A8 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00009fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBA 18216 bytes
SHA-256: e46bf0cf057cdcc1f24e49826db2f5998f04ba9e64eff7e45517ce854ffbd61c

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