Malicious PDF — malware analysis report

Static analysis result for SHA-256 1928bf5d99abaf1e…

MALICIOUS

PDF

46.6 KB Created: 2021-05-13 19:47:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a7ad314108dac42acde44ee55b4dc608 SHA-1: 6b6b8ef41d714f4668c627ce8348574cfece121b SHA-256: 1928bf5d99abaf1ec4686b3214826d21460edb93bafa1d39461759a902ad0b26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'free Robux codes' or 'game hacks'. The ML classifier also flagged this PDF as malicious. The embedded URLs suggest a phishing or scam attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/real-robux-codes-game-hack In PDF document text
    • http://progressgel.ru/images/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://progressgel.ru/images/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://progressgel.ru/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://progressgel.ru/images/get-free-robux-without-doing-anything_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_off0000490e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490E 26312 bytes
SHA-256: ee72fff019fa0f042223ef16eaf056ee4b337e02f8c55fdf80294a933731a6f3
font_01_sfnt_off0000866a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000937b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937B 18324 bytes
SHA-256: c4f7742aedc28b29f193bf98a15545964ca2d90d022e69fc2fcba8726d0ec952