Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd815bf66285f34c…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 04:45:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 969d4104db2440316f268300d424e9c4 SHA-1: 8c1d062c7f9ec0f941079008528512793a7d0153 SHA-256: fd815bf66285f34cb67c14b3fb0fd2b0efa7032ecd3b2eba83a38b5cd55da520
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as a "Coin Master Hack" generator. The heuristic firings indicate the document is designed to lure users to these malicious sites, which likely serve as a gateway for further malicious activity such as downloading second-stage payloads. No scripts were extracted, but the embedded links and redirector heuristics strongly suggest a malicious intent to exploit user interest in game-related cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-hack-ios-app-game-hack In PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-ben-ten-universal-showdown-cheat-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-for-ios_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_004_off00004e02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E02 29808 bytes
SHA-256: 64c8c439aad47c8697cc0a9f42ec89120965d7c7827309648e9d0a2ad3a06637
font_01_sfnt_off00008a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A52 17892 bytes
SHA-256: c18f05485291fd9dd2d982fa815b69c2a1f9afc9df9b250f8ccfc4cbb8514acf

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