Malicious PDF — malware analysis report

Static analysis result for SHA-256 83951471a3e0ce1b…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 08:41:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5d843e5882c1e6e94d3749b27d797658 SHA-1: acfdefd2cb4e1950e24815cbd8d849744cbf3462 SHA-256: 83951471a3e0ce1b5e92cb78e19d7bd547be5fe54022614b3a257e0010a4fe47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that redirect to a known malicious infrastructure, specifically advertising 'game hacks' and 'generators'. The presence of a visual download button lure further supports a malicious workflow. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to trick the user into downloading a secondary payload or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/video-de-roblox-hack-game-hack In PDF document text
    • http://apartmani-mestrovic-krk.hr/files/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/obc-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/robux-hack_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/event-ykm-simlatr-roblox-hack_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/best-free-roblox-games_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/guy-goes-to-jail-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off0000318f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318F 21932 bytes
SHA-256: 58b253a1dc04dccf6e096536f115f85ec0c1bfd757fb0b03052667ed8f78c1c1
font_01_sfnt_off000061f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F3 19252 bytes
SHA-256: 5f200c214adbfea6383e49e5eb152e28fb8c53bd8c96ff9354d126e551b41912

Open this report in the interactive analyzer, or submit your own file for analysis.