Malicious PDF — malware analysis report

Static analysis result for SHA-256 025391fd6bb76ae3…

MALICIOUS

PDF

45.5 KB Created: 2021-05-12 00:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a340dd8014524f4aaa014566f6bcae35 SHA-1: 44458b6b19d30aa12a52fdd5387329e22bfd5c66 SHA-256: 025391fd6bb76ae3423c4fddf8c74debab36620386929eaf9eb3b5d9c4264753
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "free generators" or "game hacks" for popular games like Roblox. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, aiming to deceive users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-roblox-app-game-hack In PDF document text
    • http://bit-sky.com/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://bit-sky.com/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/roblox-sued_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://bit-sky.com/images/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://wolfzscriptsIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49CF 26124 bytes
SHA-256: fcfef147b798bc527ea971b126f799d876802cc7d4f3508c1d0446b9128db63f
font_01_sfnt_off00008557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8557 2992 bytes
SHA-256: c9589250b6e3dd7e493fc9a03624bebef57e2a5a7267189a2827bf8e702c894e
font_02_sfnt_off00008fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 18124 bytes
SHA-256: b55918b8480f66a9a053d61f951430dbcd2a64ad9c4d9286342bad064f4e5d72