Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d980e0d7847812…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 20:19:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: db22c5d366ad28a12495d534ec77e5be SHA-1: 96586f490131f7daaeeba6834e9852e58c3f168e SHA-256: 77d980e0d78478124c10ee8117126a99831b47c8e6a5ab00745a8d695434366d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to a redirector hosted on 'netcdn.tw', which is flagged as malicious infrastructure. The document body and heuristics indicate a lure related to game hacks, specifically 'Coin Master', aiming to trick users into visiting the malicious URL. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest 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.tw/app/406889139/how-to-hack-coin-master-2021-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/descargar-roblox-hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/speed-hack-tool-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/elemental-wars-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-hack-no-verification_GM431946152.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_off00002f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F08 22640 bytes
SHA-256: f724d13e28414ac707185920071ef5ab6693665d90c01e82b0d8f1abf5bb5cb8
font_01_sfnt_off0000616a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616A 18568 bytes
SHA-256: 693d37ca6a70d00781c72b05c221f7b924a901eae5c440a3dd9f4643c36986f3

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