Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a47242afd07e9d0…

MALICIOUS

PDF

43.7 KB Created: 2021-05-11 13:38:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 43bf86ce66336df65e3e0e052741ffc8 SHA-1: b29b77de766fe9f2b2981345596b32686173d22a SHA-256: 2a47242afd07e9d0999aff83411bc1263412f60446c85f4d9062ad1b0c6ad91d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/hack-coin-master-apk-2021-game-hack In PDF document text
    • http://librarysenior.com/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-daily-free-spins-2021_GM406889139.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_off00004759.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4759 24044 bytes
SHA-256: f1db77752f992b194cb10b223d26a6eebd872929ae9e79c65387f27804deb849
font_01_sfnt_off00007e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E21 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000880c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880C 18296 bytes
SHA-256: b61961072e26d7bd0036d68b99eed8fd62c21626b4f1bee3075b0e2ab41f2bf5

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