Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cef7c2083f99deb…

MALICIOUS

PDF

44.9 KB Created: 2021-06-02 06:40:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ae7c74fe7db85ac20a248f21d5ce906a SHA-1: 1f0ba8a6947ed5283bb25711bd2ebeb489e333a6 SHA-256: 2cef7c2083f99deb9ac05d6c1ca50a9a169662781637dbaf4ab5c31cbfb4a49e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free currency'. The document body and heuristics indicate a lure to download or click on these links, likely leading to a second-stage payload or phishing site. No scripts were extracted, but the presence of embedded URLs and malicious redirector firings strongly suggests a 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.xyz/app/431946152/how-to-hack-roblox-robux-2021-game-hack In PDF document text
    • http://sd-olimp.hr/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/robux-xyz_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-spins-coin-master-links-2021_GM406889139.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
font_00_sfnt_off00005237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5237 25224 bytes
SHA-256: 895308a4da8e6b8c030006dfb47b2bf86b2f745bb313a89bef1be29d5a208677
font_01_sfnt_off00008ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB2 18888 bytes
SHA-256: 348b83c420d3ed82c83bd28a167c8bc609fdae95fde4b16820e06b6b671f2dc9

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