Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a74a306db1d686f…

MALICIOUS

PDF

48.5 KB Created: 2021-06-09 02:53:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 30cebb1f60fedf39e83bb8667da1b4ca SHA-1: 730652f37a182f0f624a5814bbbdfcd03e10de42 SHA-256: 5a74a306db1d686fc69e62d8fa38bae082b5496e039fda54cad410cceb502992
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of offering free in-game currency. The document body, though partially corrupted, contains text related to 'Free Robux' and a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/get-free-robux-in-roblox-2021-game-hack In PDF document text
    • http://pourvosvacances.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-get-roblox-toy-codes-for-free_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/contrasea-de-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pourvosvacances.com/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://pourvosvacances.com/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F8 25956 bytes
SHA-256: 876277aadb94cfd9c94454a8c155618e494ef0ca32d69ec50801ad8560ef9bcd
font_01_sfnt_off00008d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D98 3464 bytes
SHA-256: 8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20
font_02_sfnt_off000099ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CE 18596 bytes
SHA-256: 90c937999320cf0eaade2700e1639233610509d81e6cae7d61b004b386558095

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