Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9e0117481f21fa…

MALICIOUS

PDF

43.1 KB Created: 2021-06-04 03:37:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 84074c83fdb495006497fac2eebf3599 SHA-1: 08280129b259920e508a78556f88c1d20cb6b26a SHA-256: fb9e0117481f21fa0bb4d2501ec6d358d15a0e9c0e61dc5817cfc0f1244a614a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector, specifically advertising a 'Pokemon Go Free 4K Game Hack'. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake generator or hack, which is a common social engineering tactic to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/1094591345/pokemon-go-free-4k-game-hack In PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/near-tiktok-free-account_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.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_004_off00004eae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EAE 24564 bytes
SHA-256: 3b9cdffbbae101a609af5911a5ccb1b898fbc2ce9dccc5c8ee3e11ca40c5b47c
font_01_sfnt_off000086fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FE 17904 bytes
SHA-256: b7873ea0a8ef8de0dc05e11b7cf0b7cdd2c981f34863c29f0cc32241c7322684

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