Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f1c921b8a8e21d…

MALICIOUS

PDF

45.3 KB Created: 2021-05-14 05:55:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a35b2deb59ca06f85992aa63fdcd72fe SHA-1: abbbecac086ab203007462c4d6c02f3714f27f4a SHA-256: 35f1c921b8a8e21d5746fd4cfc72ba42f38765fa92449b3787a16b6f86c52d31
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are SEO-optimized PDFs, suggesting a link farm designed to drive traffic to scam-related content. The primary lure is a 'Coin Master Hack' promising verification-free cheats, directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful or fraudulent websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-hack-without-verification-for-iphone-game-hack PDF link annotation
    • http://www.metinadistribuzione.com/images/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.metinadistribuzione.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E2 24656 bytes
SHA-256: 43c88baf8976124241c7a99fc27e373c2ae57edcb133c726047fc038ce1f7130
font_01_sfnt_off00008189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8189 3560 bytes
SHA-256: 7adf3ecb2acc78bd8357c076bbb63f29c6bbfa21040d6a8d32266072fd69d550
font_02_sfnt_off00008d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D65 18696 bytes
SHA-256: b0c3a89d711ec100aafe578ee7b28ea2727b66157cc397f5079d3cb8995e9fec

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