Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f746f0b037f6a7…

MALICIOUS

PDF

48.3 KB Created: 2021-06-02 21:38:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d4264b04669262b03f2500d6a21050b4 SHA-1: 6a8c14b4ec9445f2718eebb1f716a2125c04ec5e SHA-256: 99f746f0b037f6a777c77aef0c4b20a7b26fe66a62bba295eec1b883f1bbc3c9
160 Risk Score

Malware Insights

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

The PDF contains a prominent link that masquerades as a download for a game hack, directing users to a known malicious redirector. This lure, combined with the ML classifier's high confidence, strongly suggests a phishing or social engineering attack aimed at tricking users into visiting a compromised site. No scripts were extracted, but the PDF structure and embedded URL are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/download-roblox-hack-game-hack In PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/como-hackear-coin-master-2021_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_004_off00004f7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7C 25764 bytes
SHA-256: 94e77430cf84b49be025c2e09fa57ef1e3d866f3f81ac9ffeb3a1aa84b195717
font_01_sfnt_off00008b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000985f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x985F 18688 bytes
SHA-256: 168205c9ca143a71aeda1587cc96967b3968798f00a061c189cff4b1329b070a

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