Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8208c113c53d100…

MALICIOUS

PDF

44.0 KB Created: 2021-05-15 09:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1cf725bfe789226e45a9ece1818707ec SHA-1: 77cb0151efe09aac13ff681685033ec23c3b954d SHA-256: a8208c113c53d10098c3e1452a830eaae08b86f3f96640e8e962287f9ce2458a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary redirector URL is https://netcdn.xyz/app/431946152/free-robux-mod-game-hack. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-mod-game-hack In PDF document text
    • http://www.pleiadisrl.it/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/no-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://www.pleiadisrl.it/images/real-coin-master-hack_GM406889139.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_off000049b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B9 28752 bytes
SHA-256: 79acb29d3c130eae3d05705391d212966d7d0bcefcb7a6f4c5d06722892f162f
font_01_sfnt_off00008997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8997 18384 bytes
SHA-256: 1a22b4d0ddd13aadfbc34487f46de63ded67addff296de1d1ab8eef84ffc4180

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