Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6714bffd3e4d45…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 01:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f5865f46d7a584fb64698e40f86c23bc SHA-1: 6ca77c321a7640fc45b82c96ccd8a2e7a9393dcf SHA-256: 8a6714bffd3e4d4554a962022b7fa5e4d7ff323ff8ebf4a6beab19ff562470d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and other PDF files, likely serving as a lure for game-related cheats or currency. The heuristic firings indicate that the PDF is designed to redirect users to potentially harmful content, and the ML classifier strongly supports its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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-daily-free-spins-and-coins-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-horror-games-multiplayer-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/hacks-fpr-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-greenville-hacks_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-robux-shirt_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/by-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-coins-and-spins-today_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
font_00_sfnt_off000033b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B5 22484 bytes
SHA-256: 78abe50312d9f9005a300a4ca21ad94303b963b5e793fe183ba9732d893bc020
font_01_sfnt_off000065d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 18772 bytes
SHA-256: a1dc96cae1db032b501f6986f060f4567329d4c170f8890bd2780cb4b8189df7

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