Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6923a2c084017b4…

MALICIOUS

PDF

43.9 KB Created: 2021-05-11 00:09:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c48aaf096cc28fb88a6249ee38bf202b SHA-1: 83620c2397db79a3fda4a04164a8bbef149e8dc6 SHA-256: a6923a2c084017b4c295c2caf92f2febda4ffdef63473dcd5c4be8a8c1e7de92
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "Coin Master Hack" and embeds a link that redirects to known malicious infrastructure. The document body and embedded URLs suggest a phishing attempt to trick users into downloading potentially malicious content or visiting scam websites. No scripts were extracted, but the embedded URLs and redirector heuristic indicate a high likelihood of a malicious workflow.

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/406889139/coin-master-hack-2021-apk-download-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spin-codes_GM406889139.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_off00004b8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8D 26028 bytes
SHA-256: bcc826bdb543f45aa8fa4dd83729f265756091e9941250df4affc48a8e29ca61
font_01_sfnt_off00008772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8772 18876 bytes
SHA-256: d7d40464d831938cfa9caec420339d0a09463e275fb7b32e55518fa26c88094b

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