Malicious PDF — malware analysis report

Static analysis result for SHA-256 272c66b722972183…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 10:26:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d91ac4a2195c2dfdfbf4ad8de4943bdf SHA-1: e2a8a7542dc75ea2c38433db06dfda0c7ea3eb0c SHA-256: 272c66b722972183496c620ebed07c01beffa434a89bbccce3bfae729d32ae9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a 'free generator / game hack'. The primary link identified is https://netcdn.online/app/479516143/download-minecraft-java-edition-free-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/download-minecraft-java-edition-free-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://www.youtIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_004_off000053a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A0 24748 bytes
SHA-256: 0c8ab406f98aa4758bf28344048f83e6e62954941a34a8ac0a2f081c4231a411
font_01_sfnt_off00008bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCA 3056 bytes
SHA-256: 3bf38ccea0f059764ae863929582790583b2dd886e86d92a85837ff3e16544f0
font_02_sfnt_off0000963f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x963F 18572 bytes
SHA-256: 152a86aa2203223781754dc8feb17de20161f8fdf6bb3f234180a5bd0d211371

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