Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76e0c23ab07bf7b…

MALICIOUS

PDF

45.0 KB Created: 2021-06-10 21:56:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ca0f9573ff3596702ac09aa0e886b2a8 SHA-1: d3f95ba825ab151199efc5188654839fbaa5e742 SHA-256: f76e0c23ab07bf7b490b28e26f06f48e9369ca6c0e30f3a0d9e029bfc17327e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks. The primary lure is a 'free generator / game hack' for Roblox, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-hack-phantom-forces-cheat-game-hack In PDF document text
    • https://eleganceautospa.ca/images/free-hack-no-on-roblox-email-or-no-password_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-adopt-me-free-fly-potion_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-cheat-engine-patch-bypass_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-card-codes-free-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-hack-on-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://eleganceautospa.ca/images/free-robux-no-password_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_004_off000050b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B7 26088 bytes
SHA-256: 58d37ae3201e88e79eaeec23844bb19ba6c90b69820ddc8c854d1d0d6ec63ff9
font_01_sfnt_off00008b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B67 19028 bytes
SHA-256: ed7f3b8b35bb1e05232533695c27ce6af86f086ffeb4958fa162bf4e81ee1ea2

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