Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b40e1b3d24669c9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 04:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a6a15d9dcce2d9063474cca342ce10de SHA-1: 66b58605b5b1bc48eb54c6d904f7d7359a7d1a9c SHA-256: 9b40e1b3d24669c9d3a4d8e1e04c7bf1c240e7a6fb6513bf3f5b9a1240c10cce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free currency, directing users to a known malicious redirector. The document body contains obfuscated text and multiple URLs, including the primary malicious redirector at http://netcdn.tw/app/406889139/coin-master-unlimited-spins-hack-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/406889139/coin-master-unlimited-spins-hack-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-promo_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-ice-cream-simolator-mit-fly-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-cheats-for-hacks_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-all-free-items-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-hack-generator-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-come_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-how-to-hack-into-accounts_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-downlaod-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-lumber-tycoon-2-cheat-money_GM431946152.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_002_off0000304c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x304C 22828 bytes
SHA-256: d8e87df5706f74cdc444082e6ae4e10d3ab77c3952929bf8688f8f254733a011
font_01_sfnt_off00006359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 18876 bytes
SHA-256: 358dc4db68bada18430270b8c441743941245708799d83374dd1d97c12f95da1

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