Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f9adff5684f4ed…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 01:59:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e41209581de6f469e2bafe10dc8734a8 SHA-1: be57bbf321154dc2a9da6ef1922a55322aefd7ac SHA-256: f7f9adff5684f4ed11ee80fdef6d9f919005688be43526e2b880966e079e3a5d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free items to entice users. It contains numerous links to external sites, including a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-hack-using-cheat-engine-game-hack, and also leverages SEO link farms. The document's structure and embedded links suggest an attempt to drive traffic to potentially malicious or scam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-hack-using-cheat-engine-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/comment-cheat-sur-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/cheats-for-dungeon-quest-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/anyway-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/best-free-avatar-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-hack-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-without-verify_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_off0000346b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x346B 23400 bytes
SHA-256: 14c2a10646d2f0c154f55f16c3542a99b738aba2aa7e4f1152509984053d2bdb
font_01_sfnt_off00006933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 18356 bytes
SHA-256: 8e765daddc81592b9c307bdaeda3e5bbf01844ff84e3365a98fbfe07b378b21c

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