Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a26ad83c8fe48c…

MALICIOUS

PDF

41.5 KB Created: 2021-05-11 13:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9052d4aaf44cf0644c12410e6e65c8d8 SHA-1: 1f7d4fcd82e63ac2d19994f7640dcc2e94944fb5 SHA-256: f3a26ad83c8fe48c4f0d940ef73e6a79cb585eb776e68079b9da4a1a31ee5276
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs, with one prominent URL pointing to a 'coin-master-spin-link-today-game-hack'. The ML classifier strongly flagged this PDF as malicious. The presence of a visual download button lure and the overall context suggest a phishing attempt to trick users into downloading potentially harmful files.

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/406889139/coin-master-spin-link-today-game-hack In PDF document text
    • https://septik-montag.ru/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://septik-montag.ru/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://septik-montag.ru/images/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://septik-montag.ru/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://septik-montag.ru/images/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://septik-montag.ru/images/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • https://septik-montag.ru/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://septik-montag.ru/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://septik-montag.ru/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://septik-montag.ru/images/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/www-free-robux_GM431946152.pdfIn PDF document text
    • https://septik-montag.ru/images/minecraft-classic-free_GM479516143.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_off0000477f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x477F 24616 bytes
SHA-256: 8a04ae37d7af6089787ba5e9840c16aec17d67d700db344982405cf706732ad6
font_01_sfnt_off00007fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB2 18244 bytes
SHA-256: 07d8e2c3dd01b07826262084699e95bc4377ad43729695123e376372715a200b