Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9862969e1976a62…

MALICIOUS

PDF

41.1 KB Created: 2021-05-13 14:14:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 11543027d7ae1c96bac4d2f94d7d764d SHA-1: 7217cf2235dd5809c3b54d50b71a753f5af684a3 SHA-256: d9862969e1976a626c7b04d7ebf0243895192de8674d2d7c26e96f5c2b939ba2
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Coin Master Links' and a URL that aligns with the heuristic findings. The presence of a visual download button lure further supports the phishing 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-links-for-today-game-hack In PDF document text
    • https://www.library.kysm.edu.my/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-to-get-free-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.kysm.edu.my/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://www.library.kysm.edu.my/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00004714.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4714 24436 bytes
SHA-256: eea244812e323a2ca88f3c0f6fa7318715fe2e978ae96371037044596e3b9ee3
font_01_sfnt_off00007e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 18232 bytes
SHA-256: 79bece74db2dd822c76612a1664280e186053a2a893c50b912a800105546df15

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