Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae6af5e44a7c3b8…

MALICIOUS

PDF

33.3 KB Created: 2021-07-06 14:07:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f112c1e6371e8daa5b6752f5c0217474 SHA-1: 040cce0239205d961ff4bec18fa178ea5f16fb8d SHA-256: bae6af5e44a7c3b8e9636a4db98ffb2ef4e2803bc90013bba3e26b0a8a0598f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising free game currency or hacks. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to a malicious site via a deceptive link, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/free-robux-rewards-game-hack In PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/800-robux-free_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/get-my-hacked-roblox-account-back_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.belajar.mansalotim.sch.id/__statics/gudangsoal/files/roblox-strucid-hack-aimbot_GM431946152.pdfIn PDF document text
    • https://belajar.mansalotim.sch.id/__statics/gudangsoal/files/coin-master-free-100-spin_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_off00002b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B39 22328 bytes
SHA-256: a6a2bfc9bc61b2d2630b90b7ddfa8dab220506a41753c58c86c521ecbefe2ccb
font_01_sfnt_off00005d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D14 19056 bytes
SHA-256: 5fd868e4ea22638534696fb0cd66a74addf388445670d9d0517416fd5b37f315

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