Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5fd64bb4f2b286c…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 03:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 48793d2e46ad171215b8f019bb3ceb8c SHA-1: d4c34a2a91ab5669da480a21523060ad048d3f6a SHA-256: b5fd64bb4f2b286c49821f6b2995e81e0bbd52b80abcc44a0d0fa1e17b681f8c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The document body, though obfuscated, contains references to 'Robux Earner' and a URL that aligns with the heuristic findings. The embedded links likely lead to a second-stage download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/robux-earner-game-hack In PDF document text
    • http://safetin.ru/images/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://safetin.ru/images/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://safetin.ru/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://safetin.ru/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://safetin.ru/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/robux-download_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://safetin.ru/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://safetin.ru/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://safetin.ru/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://safetin.ru/images/free-robux-without-human-verification-2021_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_003_off00004787.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4787 27472 bytes
SHA-256: 3b3a9cfffd8b5677238ae81c1900cd761a7a8029325812f03f83898035e53e41
font_01_sfnt_off00008525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8525 18076 bytes
SHA-256: f5a75b1f1fd7f518e5c7427b096eb9f92d711688fa0aea541fd532851a6f5025

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