Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27476dfe4f721ae…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 17:08:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5d142e39943e2114ae7d219a720700a8 SHA-1: 095fe421c11f697621c20e6c01a1f5f414d21138 SHA-256: c27476dfe4f721aec49be6878e7242a7f84551c8d647615bae3eef78e5e53803
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The document body and heuristics indicate a lure for free game items, likely leading to further malware downloads or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spin-coin-master-game-game-hack In PDF document text
    • http://sd-olimp.hr/files/cheat-engie-how-by-past-roblox_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/robux-redeem_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-friends-hack_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-broken-bones-iv-hack_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-cbro-hacker-gets-banned-mid-game_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-hack-robux-infinito-download-2021-pc_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/mobilehacks4u-free-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/god-roblox-hack-script-fe_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_002_off00002f03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F03 23112 bytes
SHA-256: 3fc7d8da903addd0149fcf426b01e81a0356713bc4ec4d664fd7f6c083efeb57
font_01_sfnt_off0000633f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633F 18432 bytes
SHA-256: 85223bd49af77d40a0092bd2c3733620e417d7d5fcdc632707b7c4feb3d04c0e

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