Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19d8a8a4c45491f…

MALICIOUS

PDF

43.4 KB Created: 2021-05-17 00:06:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 25691ec27ceba3db64de96744dcb285e SHA-1: c580c6957e9ec523a586e5c12353d580ebfd87c6 SHA-256: d19d8a8a4c45491f91b34f6bfd48a13801f928995eebf339ce6eed04cf7b1c9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game items and currency to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The ML classifier strongly indicated maliciousness, supporting the observed redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-free-spins-link-today-blogspot-game-hack In PDF document text
    • https://www.rondeberg.com/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.rondeberg.com/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://www.rondeberg.com/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://www.rondeberg.com/images/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn 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
stream_003_off00004b79.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B79 25320 bytes
SHA-256: e8c7390be55bc23d14f120ece7fb5c3f1684ce5ff58615be4f958aa6c5090ae7
font_01_sfnt_off0000851f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851F 18988 bytes
SHA-256: 1a94c2a9bc7d67929b2b5125a5437c33a0f1d263f98c1f8ab91c7c8b0822f9c3

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