Malicious PDF — malware analysis report

Static analysis result for SHA-256 2979acbce9b41389…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 11:04:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 62fedf6756af84a58cad8eabff2da4a4 SHA-1: 49bce8b95d9590f23d90bc551066dfcce78910db SHA-256: 2979acbce9b413893cdebbc4aba8dd5a82b7df8b7b77ee54aaf3d0150068882a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on offers for free in-game currency or hacks. The primary link, http://netcdn.tw/app/431946152/free-robux-apps-that-work-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-apps-that-work-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-500-000_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pubg-uc-new-freepik_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-my-hero-bizzare-adventure-cheat_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/ulgamesresources-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/conquerors-3-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000323d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323D 22564 bytes
SHA-256: 211d6a7ccb0090abc78dcfdc01d62f922666b536ceff25f7d267cdc9bd247a7e
font_01_sfnt_off000064b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B5 19528 bytes
SHA-256: 3ce59685ce564c47d51d5d1714b73889d1d344349ceb90d9e3a1730e11095f67

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