Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab8ae0aabb9dfa4…

MALICIOUS

PDF

33.1 KB Created: 2021-06-19 00:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2d5fa8a0235684abe228f8bd02783b19 SHA-1: d4c4567f9ccc6a503d83331bdbd9348b52da4e94 SHA-256: 3ab8ae0aabb9dfa40a10a21f6b17c4c0989ff110d6114e589ade20b0dbd06402
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a 'game hack generator' lure, identified as malicious infrastructure. The document body and extracted URLs strongly suggest a phishing or scam attempt, likely to trick users into downloading further malware or providing credentials. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a high likelihood of a malicious workflow.

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-can-i-hack-roblox-game-hack In PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-roblox-codes-2021-october_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/pokemon-go-free-friend-codes_GM1094591345.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-cheat-in-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_off00002ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCD 21784 bytes
SHA-256: 417e754a7dba0ad28de3295bdaae5298aedfaf567b92e44522002803938910b9
font_01_sfnt_off00005c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C90 18820 bytes
SHA-256: 1bc83bf65c156f826be7f8a864befdaa6ee91091df0c4d45b56d5ef4f33541f8

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