Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f93e9544c45f9d…

MALICIOUS

PDF

36.3 KB Created: 2021-07-07 21:37:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2b4a52d29bf1ca148a7a4f38e7a94b6b SHA-1: 09482edabc26a99a472c54c8cf38e31090360627 SHA-256: 85f93e9544c45f9db407e387acd2f1338255a3ef117641809a2b795cad309527
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a common lure of free in-game currency and hacks to entice users. It contains multiple links to a malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/free-diamonds-coin-master-game-hack, which is designed to lead users to potentially harmful content. The document's structure and embedded URLs strongly suggest a phishing or scam attempt aimed at driving traffic to malicious sites.

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/free-diamonds-coin-master-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/tiktok-free-app_GM835599320.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-survivor-idol-hack_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/poke-coins-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-pokeballs-in-pokemon-go-2021_GM1094591345.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-obc-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/pubg-uc-png_GM1330123889.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-hack-site-robux_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
font_00_sfnt_off00002e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E63 22380 bytes
SHA-256: babd7c9abe493208e5c66baadbb66f171c808eec516db86eff23f67456502717
font_01_sfnt_off00006024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6024 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A09 18600 bytes
SHA-256: da824c8de7a59d01d725a44d62aa23261c44ef626b00917327570bf01bcd9ba0

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