Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2b8b79e316e53e…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 13:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5430596318167308e9ef988f872f9a29 SHA-1: cfd3089176f50f5bcabbdf074ab9292bf3192455 SHA-256: ef2b8b79e316e53edc481785ac392cfe9fd06cfd2780a93b7dabaaa97cda279a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this by referencing game-related hacks and free items. While no scripts were extracted, the primary attack pattern involves tricking the user into clicking a malicious link.

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.co/app/431946152/is-roblox-free-on-three-game-hack In PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/get-me-robux_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/how-to-sell-roblox-items-for-free_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/roblox-roalye-high-how-to-get-multi-colours-for-free_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/prison-break-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/free-carde-roblox-gift_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/free-white-hair-roblox_GM431946152.pdfIn PDF document text
    • https://www.ppid.banglikab.go.id/assets/CKImages/files/minecraft-for-ps3-free_GM479516143.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_off000031ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AB 22724 bytes
SHA-256: 6387750f7e2e55aaebc0a855dad70cb10a4a596484b1e92c6f568117b372ded6
font_01_sfnt_off0000649c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 18816 bytes
SHA-256: 891384e13c7d3abf18749cc2d44e867d5a8259c79d346f68f8561cfd56507ae4

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