Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b8f8e2ddd7cf03…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 13:16:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 374da0904cd348849e7b57d745bd3b49 SHA-1: acfc1e7bb3e8c448881d82f79d59d8ec64c776a6 SHA-256: c8b8f8e2ddd7cf03133f76a556412d9f44475a1b620550ef7c4b54320a8f91cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as generators or hacks for popular games like Coin Master and Roblox. The presence of these links, combined with the ML classifier's high confidence score, indicates a strong likelihood of a malicious intent to redirect users to potentially harmful sites. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious activity.

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/fb-coin-master-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id//repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-robux-generator-only-enter-password_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-download_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-dinosaur-simulator-dna-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-apocalipse-rising-hack-dll_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-online-free-sign-up_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-robux-codes-list_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/funbloxxyz-free-robux_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
stream_002_off00002dfa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DFA 22692 bytes
SHA-256: f8c7b08dd82ecaa28b52d3be3582829970dc30600ded746bfc4e240c0d51266c
font_01_sfnt_off000060ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 18156 bytes
SHA-256: 7a3cd79ff080fa27ccf3189e4d913bb82dfe371fff983502a27164cba1261ff5

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