Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27482de46f64cda…

MALICIOUS

PDF

34.9 KB Created: 2021-06-20 21:35:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: da8c456a919c769012719276885320cd SHA-1: 214842b2662b706815cc69e067b5a2abd2e8c98e SHA-256: d27482de46f64cda480ff1baaaac80c911da609f17517693b6c3d622ec0d88b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising free game currency and accounts for popular games like Roblox and Coin Master. The heuristic firings confirm these links lead to malicious redirector infrastructure, likely serving as a lure for users to download further malware or engage in phishing. No scripts were extracted, but the document body and heuristics strongly indicate a phishing or malware distribution attempt.

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/free-roblox-accounts-with-obc-2021-game-hack In PDF document text
    • http://zercalo.org/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/pokemon-go-free-vs-premium_GM1094591345.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/best-hack-for-dragon-ball-z-rage-on-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-roblox-without-getting-banned_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-online-robux-generator-no-surveys_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-diamond-finder-hack_GM479516143.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
font_00_sfnt_off00003166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3166 21608 bytes
SHA-256: 8aa2d1bcc3c8c8572aad29bc0ac938575d739a0cd371222aeab9435472f21cf0
font_01_sfnt_off000060fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FE 19780 bytes
SHA-256: 27711313302d0257d9569ec1e301dcaae7fcc41fcff4e3ab5957fbbee7c77cde

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