Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b4752ba21de9dc…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 05:24:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 762a76d6748e44e240d7aa695e117c7f SHA-1: 76c4845bf5dfe9411f704451f08fb17a58e80430 SHA-256: 15b4752ba21de9dc511f3e3cf3fb2597d95848d0ca8c4790f8e34004fa81642c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and external resources, masquerading as game hacks and generators. The ML classifier also flagged this PDF as malicious. The embedded links are designed to entice users to click through to potentially harmful websites, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/479516143/free-minecraft-texture-packs-game-hack In PDF document text
    • https://tena-g.hr/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-roblox-templates_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/pubg-uc-shop-bd_GM1330123889.pdfIn PDF document text
    • https://www.tena-g.hr/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-links-to-coin-master_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_off0000504b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x504B 29132 bytes
SHA-256: 57470bebe278e1d7371480c4a576c0c7ddeac315f4d3e9b6bdc2fc54784fa7c6
font_01_sfnt_off000091cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91CB 18240 bytes
SHA-256: f1e7a9ae3acfaa3d56f6a9afcdcc307065316a5e3d8814942fd3993c062bfaf5

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