Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b254a633d963847…

MALICIOUS

PDF

42.1 KB Created: 2021-05-13 03:32:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dc32ac1dea24d825dcf7ec401711dcf0 SHA-1: 337d3ade0fb7e1eaf7148bbbaba00f4ae08d55fb SHA-256: 7b254a633d9638472c037f3aaa152a0d17a4bae934647127b4070e3fec9c98e6
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that impersonate Facebook and lure users with "Coin Master Time Hack" promises, redirecting to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the document body contains obfuscated text and numerous URLs pointing to potentially harmful content. The primary attack vector appears to be social engineering via a fake generator/hack lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-time-hack-game-hack.
  • 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 https://netcdn.xyz/app/406889139/coin-master-time-hack-game-hack In PDF document text
    • http://1a-vermietung.com/images/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-spins-1701-20_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B02 24364 bytes
SHA-256: ca950de56a7e45dcc78f19ddd4c9e6d9f7db76b3ec9e79c3ed1332847c177881
font_01_sfnt_off00008334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8334 17976 bytes
SHA-256: 87fff38dbb03260eba139e3e02117f9160eb94cd4e4c58474dc2e0f8f330ccfe

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