Malicious PDF — malware analysis report

Static analysis result for SHA-256 898f42475663a9e7…

MALICIOUS

PDF

45.3 KB Created: 2021-05-14 14:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ea8dffb54fc528ca8fd68a8b5e9f499b SHA-1: a85b4e4f048c9a6ae604fed5f3e8ecb3094ab183 SHA-256: 898f42475663a9e7f1e701db56b8d4264cbeceb3da088fc24f58b7602ecf47e8
200 Risk Score

Malware Insights

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

The PDF contains embedded links that impersonate Facebook and promise free Robux or game hacks, directing users to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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.
  • 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/431946152/free-robux-codes-generator-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/431946152/free-robux-codes-generator-game-hack In PDF document text
    • http://scarlier.fr/images/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://scarlier.fr/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://scarlier.fr/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://scarlier.fr/images/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://scarlier.fr/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://scarlier.fr/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://scarlier.fr/images/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://scarlier.fr/images/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://scarlier.fr/images/coin-master-free-coin-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000492c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492C 30592 bytes
SHA-256: 2fc134cf74922430b4e30f0df0e84243372f6e4cadad8a1c578a36f80870298d
font_01_sfnt_off00008e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E22 18520 bytes
SHA-256: 1c25fc10cbc7d9d0374bcdf27ae43ed9c15c29ea4d1fc113120e8f54655ee57b

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