Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f681411add39328…

MALICIOUS

PDF

35.9 KB Created: 2021-07-09 15:43:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 08a5ca4716cf1ead828833b4e6e8880c SHA-1: 12b3cb0231473cc9d430f3fc3248941bcb459421 SHA-256: 0f681411add39328462a65c7fa30eac17a3fa622921c47d894b749b16a6b074e
168 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links to known malicious redirectors and infrastructure. The document body and heuristics indicate a lure for game hacks, specifically "Coin Master Hack", which redirects to a URL hosting further malicious PDFs. The embedded JavaScript likely facilitates the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.tw/app/406889139/coin-master-hack-100-working-game-hack In PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/roblox-cheat-engine-for-robux-2021_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-roblox-avatar-stuff_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-be-a-vip-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-followers-in-roblox_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-install-hacks-to-roblox_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/roblox-offensive-hacks_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/roblox-dinosaur-simulator-cheat-engine_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/boku-no-roblox-remastered-money-hack_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/is-hacking-on-roblox-illegal_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-robuxs-hacks-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/bleu-roblox-mega-free_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-codes-on-roblox-assassin_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/huskybuckscom-free-robux_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
stream_002_off00003446.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3446 23208 bytes
SHA-256: 7cb880c4cc1ef7b5c880ac45a6d822ee27922aea8dffc0ea9082de264c517c10
font_01_sfnt_off000068c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C7 18480 bytes
SHA-256: 4deb687acd323bf9668adf7f6443399c29d9f2c86793632556f948df274d5cf0