Malicious PDF — malware analysis report

Static analysis result for SHA-256 930b506f4bc9dc4b…

MALICIOUS

PDF

41.7 KB Created: 2021-05-15 23:00:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 73627f6e9c00691953088b518b98aa9d SHA-1: 3ebed0fc9092adf06578cf4c747690b6b980b961 SHA-256: 930b506f4bc9dc4bcb1cd6014257bbb7da1e825bdfe55105409ec556478cdd28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators". The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-cards-free-cards-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-cards-free-cards-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-free-edition_GM479516143.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_off00004a61.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A61 24328 bytes
SHA-256: d6c08557b59a330d8b536e18965598887bd1ed2362491a3d28cc58f880d2fd53
font_01_sfnt_off000081e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E0 17884 bytes
SHA-256: d54aa51eaaaa3e2864f0114713409e316145a0183ee6aba9be1e443db1dceb19

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