Malicious PDF — malware analysis report

Static analysis result for SHA-256 9781b98f9ac190bd…

MALICIOUS

PDF

44.3 KB Created: 2021-06-07 22:15:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6ac7c5e13834fcf96629004c50ac16b0 SHA-1: e3458664f33ddf5c46e00943a3113db04b5473ca SHA-256: 9781b98f9ac190bddbec7a167b3fcfaeaea681b8758061326847ea6bf57e55b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary link, 'https://netcdn.tw/app/431946152/roblox-hacks-mrantifun-game-hack', is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering lure to drive traffic to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-hacks-mrantifun-game-hack In PDF document text
    • https://www.stayon.no/images/pubg-uc-shop_GM1330123889.pdfIn PDF document text
    • https://www.stayon.no/images/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/pokemon-go-free-mewtwo_GM1094591345.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.stayon.no/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.stayon.no/images/how-do-you-hack-roblox_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_off00004f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F15 25640 bytes
SHA-256: 2ca40a1479b221f24ea512450c6efbdfa33affdcc4df8c2fb114af3abf1c9b2c
font_01_sfnt_off00008925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8925 18744 bytes
SHA-256: f804784ecc3a4ef1aad2e0167f8a237d5679699c39532c61c8a1dda16a4a1d38