Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ab0e760e71f907…

MALICIOUS

PDF

44.1 KB Created: 2021-05-16 22:10:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5c30b869467d7ce6766461a3c758fd7a SHA-1: 539ab61991ba36d4318320e15f0ee6f4485b44d1 SHA-256: b0ab0e760e71f907e92354d5b0a9f5921724fe6b1687d9539ebd664e08d12ada
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising game hacks and cheats for popular games like Coin Master and Robux. The document body, though partially corrupted, contains references to these lures and the malicious URL. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/coin-master-free-gifts-game-hack In PDF document text
    • http://kukuck.de/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-roblox_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hack-2021-android_GM406889139.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_003_off000048aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AA 24824 bytes
SHA-256: 462e065b35d31a435b6699a1fc9f68e5eb00835a2b5ec3eaab790482e37a6742
font_01_sfnt_off00008164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8164 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4F 17712 bytes
SHA-256: 401d56b29285354d6954c3c26e793cbeb56329cdc5209d9139ec018457d4ba23