Malicious PDF — malware analysis report

Static analysis result for SHA-256 68973f09d45637e3…

MALICIOUS

PDF

43.7 KB Created: 2021-05-11 14:34:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4679f91f89232bfb8eed7f760b625161 SHA-1: ac1f8d16aa060171b5ffeec16f19c989328683b6 SHA-256: 68973f09d45637e396fd51f1ddb64d730d93539980688cdbf005230c6bd570cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free generators" to lure users. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-hacked-apk-download-for-android-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely leveraging a client-side exploit or social engineering to deliver a payload.

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-hacked-apk-download-for-android-game-hack In PDF document text
    • http://www.library.smactf.sch.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coinmaster-spins_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_off00004c43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C43 26460 bytes
SHA-256: 1bd68f2d4d9426b3b7de7f7f143ed34df41ce56ef3058f55f564522a080f7435
font_01_sfnt_off0000877a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877A 18636 bytes
SHA-256: 87f24663a42dd6b293392c347e04cdb733edd0a8e3460407db1e5d5abad0db8a

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