Malicious PDF — malware analysis report

Static analysis result for SHA-256 11337d3984abca58…

MALICIOUS

PDF

42.6 KB Created: 2021-05-20 05:03:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 16cfba2cec4e236b09f7bc0547a5e372 SHA-1: e38c9a3f193f2beffc519b2eff2d06961fbb8fc2 SHA-256: 11337d3984abca58faa43a1d8b6c42a5b622000134f3565c3017b88721676ed5
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" and "free spins" to entice users. The primary malicious link identified is https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-app-game-hack. The document body and embedded URLs suggest a social engineering lure to drive traffic to potentially malicious sites, likely for further exploitation or malware delivery.

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-daily-free-spins-link-app-game-hack In PDF document text
    • https://www.manmed.info:443/images/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004945.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4945 25160 bytes
SHA-256: 5062bd4e5f992feb5a3cf86c576e8dffaefcbf82bd39c4152df8062ec4b6c684
font_01_sfnt_off000083a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A7 18476 bytes
SHA-256: 8af254e049fcccc1442405a550d0e3ce0b782d3872c3c9d4c1baf9e82e1cff79

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