Malicious PDF — malware analysis report

Static analysis result for SHA-256 15bccb8f9ef64911…

MALICIOUS

PDF

42.1 KB Created: 2021-05-15 10:06:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 888ed8ced841f8a0ad587ede313ba8af SHA-1: 6a487e9dcc0e6a0963c80b9443fde682ea3eceac SHA-256: 15bccb8f9ef64911d764394a831fd9bd1a2bba2019f9f7226d6a418d6bdf9355
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically disguised as 'free generator / game hack' lures for popular games like Coin Master and Roblox. The document body and embedded URLs reinforce this theme, aiming to trick users into clicking through to potentially malicious sites. No scripts were extracted, but the PDF's structure and embedded links strongly indicate a phishing or scam attempt.

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-free-coins-links-2021-game-hack In PDF document text
    • http://dialine.cz/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://dialine.cz/images/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://dialine.cz/images/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://dialine.cz/images/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/coin-master-hack_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_off000048a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A2 24988 bytes
SHA-256: c132403a5b72758be2bcf00024fa34c3934456fad6f921a7bcbf384a8518be86
font_01_sfnt_off000081f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F9 18284 bytes
SHA-256: be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449

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