Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7bab63c425d7566…

MALICIOUS

PDF

46.1 KB Created: 2021-06-14 01:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3665076baf3882f5e0353ce84fce08bf SHA-1: e28b4a2047af20e659912503ab2a06e486801ac5 SHA-256: b7bab63c425d7566cbd067694a8ec959d50ac6963fe1a2f328ea71148fc7beda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "free generator / game hack" lures. The presence of multiple links to similar scam-related content and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. Although no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest it functions as a phishing or scam lure, likely leading to further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.co/app/431946152/robux-login-free-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-mask-hat_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-sites_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacks-for-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/viper-venom-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-script-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-hack-into-denis-acount-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C70 25300 bytes
SHA-256: f66fad79dd68683a84d95f6baa90d7c333d9adc64e075b55ea8e36a1f830bef0
font_01_sfnt_off0000877f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877F 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00009136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9136 18420 bytes
SHA-256: 4aa06a8031b3ccfda24f8eb5675b26d0ee50aeee6674416969563af36be73fc1

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