Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28fff0c06f50499…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 13:13:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ccb120280a2cd2a3e57a6a56b520042e SHA-1: 14440e9d2a0513f0bc3f0c619e3748ac0f6abb30 SHA-256: c28fff0c06f5049919c5e889f9779fd9f8bc8789cc5da7e022188ca59cdcd683
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacks and free items, directing users to a malicious redirector URL. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to lead the user to a compromised or malicious website. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or scam attempt.

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/how-to-get-doge-head-on-roblox-for-free-game-hack In PDF document text
    • https://yowchang.com/image/data/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://yowchang.com/image/data/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-to-hack-roblox-bubble-gum-simulator_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/roblox-meme-gui-free_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://yowchang.com/image/data/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/roblox-pics_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/roblox-how-to-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://yowchang.com/image/data/files/roblox-noclip-hack_GM431946152.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_off00003035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3035 22076 bytes
SHA-256: 4a36e9a8e1aafd886c54b191bcf821e28597b1c716585defcb78b4da1b45d202
font_01_sfnt_off00006075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 19260 bytes
SHA-256: bf2f33bce1ec988020af2ab726757327d2c11ec617eab0f4a9f40a99b8cb96bb

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