Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f7bd5d08378d9e…

MALICIOUS

PDF

44.8 KB Created: 2021-05-16 04:03:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1813cc3c55a62af8e696f8d6e2cd65c2 SHA-1: 37b228f9e23f09d636bbeec0e0e1333555422eb6 SHA-256: 15f7bd5d08378d9ea7836b9a29be4574a70eca2f93028ac9b59b2872395ccb51
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Free Robux Pins' and a URL that aligns with the heuristic findings. The presence of multiple links to potentially malicious domains suggests a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/free-robux-pins-game-hack In PDF document text
    • http://unsere-beagles.de/images/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/instant-robux_GM431946152.pdfIn PDF document text
    • http://unsere-beagles.de/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://unsere-beagles.de/images/coin-master-free-coins-twitter_GM406889139.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
font_00_sfnt_off00004a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A7E 24572 bytes
SHA-256: 71e70897b5816a0269c200e3411d0da8b8df1e5d788e609d2178b2d46923d815
font_01_sfnt_off00008279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8279 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00008c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C76 18288 bytes
SHA-256: be7609bd7ddc69eb994b080447c8f3e95bc75a4b3676ce3cbb6c2619f3d9524c