Malicious PDF — malware analysis report

Static analysis result for SHA-256 099c3656d6b25f8b…

MALICIOUS

PDF

49.3 KB Created: 2021-06-04 02:05:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c3d5ef6439ae1c3d3a76a912999ad71c SHA-1: 0a0bd62eec2d694a26f5a5f0f12784adf3314a32 SHA-256: 099c3656d6b25f8ba926d35a011dc4c2b1c8bdb3d49b873171726e3d1c9a6c1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users to click on embedded links. The primary link, 'https://netcdn.online/app/406889139/i-didnt-get-my-free-spins-in-coin-master-game-hack', is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/i-didnt-get-my-free-spins-in-coin-master-game-hack In PDF document text
    • https://opac.heritagejkt.org//repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/robux-online_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54A5 27176 bytes
SHA-256: 29125895dc9d2d7a6ca0616f38b64ad4481b2887598180e87589a83ecc5c621f
font_01_sfnt_off000091c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C9 3380 bytes
SHA-256: cb8371cc187c45116d0984119c2893dd3db0d7f7d568d007a419406e6ca9f389
font_02_sfnt_off00009db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB6 18408 bytes
SHA-256: 1118565247505be74bb0ed189a3b4637fe958dfb480a14239bd8a4b20068b712

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