Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b903d0e628ff363…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 02:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a5bbc164c89799537a27ce7361ff2bd8 SHA-1: c9581f7159e7bc219e001502cd2b08d1f6ec0848 SHA-256: 3b903d0e628ff363582f94587d401e8437dc06ba4c83d128639d6a155a6bd3c6
142 Risk Score

Malware Insights

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

The PDF contains multiple links disguised as game hack generators, specifically targeting popular games like Coin Master and Roblox. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document likely attempts to trick users into revealing sensitive information such as private keys or passwords under the guise of obtaining game benefits. The presence of embedded URLs and the ML classifier's high confidence score support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/links-to-get-free-coins-in-coin-master-game-hack PDF link annotation
    • http://moskewicz.com/images/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://moskewicz.com/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/robux-download_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://moskewicz.com/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://moskewicz.com/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004944.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4944 25740 bytes
SHA-256: f31d46b35d6382e8647050fd2c1a2125747f78f03c79d586a59271f13d769973
font_01_sfnt_off0000853c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EED 17880 bytes
SHA-256: 6ce9208e74195ec5a9110919f623d15dc0b2cedde82057101de8690cf454e309

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