Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3b578917a2f5f2…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 23:34:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ee72fd652b3f2cdafa3ef5d5797c4883 SHA-1: 6ab2d7fc834608f4411827871937b2088aacf633 SHA-256: 7a3b578917a2f5f296f5076f49b4395c29ff65afc6404d7db5f169f6a5d982be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.xyz/app/406889139/coin-master-hack-xyz-download-free-game-hack`. The document body and embedded links suggest a lure for game-related cheats or currency, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent, likely leading to a second-stage download or exploit.

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-hack-xyz-download-free-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-apk-35-13_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_off00004a9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9D 25392 bytes
SHA-256: 757cd0056c8b5a961b32326bd272cd17c8fdcbd4e5499fe2b21e4bb3d90bac93
font_01_sfnt_off000083d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D5 18952 bytes
SHA-256: 779e1b2868c6fd3267453bb754d4fa6de943de141d85dc4b922527d53be01414

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