Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac376169fd9ebe67…

MALICIOUS

PDF

44.1 KB Created: 2021-05-16 06:34:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: dedb4a29e2dacd4c5627ced2d94b407a SHA-1: 3a4215009b5ddc8f13a99d42613f6e6415081c7a SHA-256: ac376169fd9ebe67e360899cc5fc687af9aff4611412f63d96db90d0f6d5f810
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that offer 'free generators' or 'hacks' for popular games, indicating a social engineering lure. The primary link, 'https://netcdn.xyz/app/406889139/how-to-get-free-shields-on-coin-master-game-hack', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/how-to-get-free-shields-on-coin-master-game-hack In PDF document text
    • http://pisanie-nut.pl/images/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://pisanie-nut.pl/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://pisanie-nut.pl/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://pisanie-nut.pl/images/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://pisanie-nut.pl/images/free-robux-com-roblox_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
stream_003_off00004a2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2B 31436 bytes
SHA-256: d0c5787f576e90a8caae155fa050db51fe074382a5ed880ce7078c39e0bad2d7
font_01_sfnt_off00008a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A60 18288 bytes
SHA-256: 9f23db5f7e4aea9ade489dbfee04f76c59a98f319c99e466b9c1fecfdfb20686

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