Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d879bf2f2472f3…

MALICIOUS

PDF

46.3 KB Created: 2021-05-19 16:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac2386570d0700787f11f3d99d9428a0 SHA-1: e710a5097b5cca6ffaf8a827fa7d0fce5b74d883 SHA-256: 58d879bf2f2472f35586263d37c61c03ccd408e0378e3e6e776457e0c5d339c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as offers for free game currency or hacks. The document body and embedded URLs promote these lures, aiming to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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/how-to-get-roblox-premium-for-free-game-hack In PDF document text
    • http://only1you.ru/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://only1you.ru/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://only1you.ru/images/tiktok-unlimited-free-trials_GM835599320.pdfIn PDF document text
    • http://only1you.ru/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://only1you.ru/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/robux-only_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004848.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4848 26264 bytes
SHA-256: 62002c90661fa284ef3addd196d599e9c28b925656117a24e19d0e7f294741dd
font_01_sfnt_off000083a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A6 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000090b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B8 18888 bytes
SHA-256: 80296d3e833823be7f1e21571c517a003a5ed5633da55eadbe5c2ecc0576c034