Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba2f92cd73ef632…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 08:19:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 67a9520310b5ea37d9b9071ebc7543fa SHA-1: 6a8da27f117acd09fff72b118a0c8fc136867e2f SHA-256: 9ba2f92cd73ef632c1b5dc7950dd09ea947bc7e5af9b684c434e6080d1c9bda1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and sites offering game hacks and currency, indicating a phishing or scam attempt. The primary malicious link identified is http://netcdn.tw/app/406889139/free-spin-coin-master-apk-game-hack, which is flagged as a known malicious redirector. The document body and embedded links suggest a lure for users seeking in-game advantages, likely leading to credential harvesting or malware download.

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/free-spin-coin-master-apk-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-do-i-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-on-roblox-2021-not-clickbait_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-obby-no-password-2021-link_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-clothescom_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/android-robux-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-monster-battle-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/pubg-uc-avatar-hd_GM1330123889.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-clothes-boy_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
font_00_sfnt_off000032b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B8 22984 bytes
SHA-256: 8ed26b24ab82e7f2ce414e52f6f93bc44fb873f6ac18ce02d9e884d618b4f43f
font_01_sfnt_off00006660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6660 18344 bytes
SHA-256: 7d9887165ef16feadfba3a4a15f66fbc2523fe3814b25ea6526ef71165c50439

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