Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a556d849d69c22…

MALICIOUS

PDF

34.2 KB Created: 2021-07-01 06:41:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9baa60e47b68353b46f854b3e51689bd SHA-1: 4c099d87b2e564897939647613c29ed1b16d39ad SHA-256: d1a556d849d69c2286dd17759fd98d2f1154b91befb553da65480659810e5c90
168 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and links to known malicious redirector infrastructure. The document body and heuristics indicate a lure related to game hacks and free in-game currency, designed to entice users to click on the malicious links. The embedded JavaScript likely facilitates the redirection or download of further malicious content, contributing to the exploitation of the user's system.

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.co/app/431946152/how-to-use-cheat-engine-on-roblox-game-hack In PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn 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/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/roblox-hack-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/obc-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/how-to-hack-roblox-with-charles_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/hack-jailbreak-roblox-2021-cranberry_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/arsenal-roblox-hacks-pasebin_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/roblox-prove-cheat-engine_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://cheryco.ir/assets/public/js/uploading/files/tiktok-freein_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED6 22412 bytes
SHA-256: 4f6164d43aa8ec52263ebe4dd57cdc7900db8e4e8093f2cd0b9939c26ab56748
font_01_sfnt_off000060a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A0 19040 bytes
SHA-256: ea4105b20afba7c8f35cae9a8f01945e7050fd7d787efb072bef46dc3f910634

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