Malicious PDF — malware analysis report

Static analysis result for SHA-256 699a40213933b6d4…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 06:44:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 164a8c0101a99bf425e4b2f37c3b247d SHA-1: 795583d2dbcc02fbdefbf7ba36680224fc24aadc SHA-256: 699a40213933b6d4773364a311411531a8e1a0eebe0b8fb7eddb117246787b8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators for popular games like Roblox and Coin Master. The heuristic firings indicate that these links are designed to lure users to potentially malicious websites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to lead users to phishing or malware download sites.

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/h2-account-stealing-hack-roblox-game-hack In PDF document text
    • http://achauco.vn/public/upload/files/how-to-enter-in-roblox-paid-games-free_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-catalog-hack-2021_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/create-roblox-faces-free_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-hack-diamond_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-headset-roblox_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-hack-in-hilton-hotels-roblox_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-add-script-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-script-executor-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_off0000306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306E 21960 bytes
SHA-256: 938b025db8752b3a4c21522f9f635717f3185a040b6f94567f15b047d195e055
font_01_sfnt_off000060e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 19144 bytes
SHA-256: 269cf6562e5a6f5a724e4a8838b10a57ba9e378f632f6e2dd7b3af6d47d75290