Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4150aca84875b1…

MALICIOUS

PDF

31.2 KB Created: 2021-07-07 10:27:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db895345750887bdac4a6e710e44d3a3 SHA-1: 3bcaaa0fa33ee3eb4baa5d39aaf23b803640b5f5 SHA-256: 7e4150aca84875b1f049e62682533fbe00e284e1b1dd92f7d091fc5c215af248
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector leading to a 'free generator / game hack' lure. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves tricking users into visiting malicious websites by promising free in-game items or hacks. No scripts were extracted, but the embedded URLs are the main indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • 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.
  • 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/479516143/how-to-make-a-free-minecraft-account-game-hack In PDF document text
    • https://tckontrola.hr/files/pastebin-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/happymod-hack-roblox_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/roblox-bee-swarm-simulator-hack-download_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/hacks-robux-gratis_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/roblox-studio-script-hack_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/ninja-run-roblox-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 22444 bytes
SHA-256: ee4ac0bb7dc1f0366f3d475ac0eb1d8e144069f86ea67d34eeb29dcbf45e099a

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