Malicious PDF — malware analysis report

Static analysis result for SHA-256 11033bc9040111bb…

MALICIOUS

PDF

37.4 KB Created: 2021-07-05 06:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 38f49c3c95249e6d1b3a4833194e7631 SHA-1: bcc2a7cb124e43d412465201aa7c9f78e20b531a SHA-256: 11033bc9040111bb738bfc4c8dcb38ba3b642a04a1cba3c330b095cfc70821ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded links that redirect to malicious infrastructure, masquerading as game hacks and cheats. The primary lure URL is http://netcdn.tw/app/406889139/working-coin-master-hack-game-hack, which is flagged as a known malicious redirector. The document body reinforces this lure with text related to game hacks and generators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/working-coin-master-hack-game-hack In PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-codes-2021-march_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/download-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-roblox-card-code-giveaway_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/cmo-hackear-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/pubg-uc-sale_GM1330123889.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-a-free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-script-executor-level-7-free-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003274.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3274 22792 bytes
SHA-256: b5f4a27fe0ddada6336f35609d077ba1a1ef01543509b58b8d867450f0444c58
font_01_sfnt_off0000657a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657A 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 18204 bytes
SHA-256: 2f3fc4cea7c667aba6bd4fbad35a90c469a811863d2ececabae30f54f8a6c622

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