Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe4ef180f18754f…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 12:29:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cecc8fda569593dafc5bdd95b0f2a301 SHA-1: abee83ac8b59ea274ad1b6105060cfe6a15427cf SHA-256: efe4ef180f18754f667ea8dfb540d686595c17edb8d97ccdb079abcb09d50103
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure related to game hacks to trick users into clicking a link. The primary malicious intent appears to be the solicitation of sensitive recovery secrets or private keys, as indicated by the 'SE_SECRET_RECOVERY_LURE' heuristic. The embedded URL leads to a page that likely hosts further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-hack-spins-and-coins-unlimited-free-download-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/tiktok-free-vs-paid_GM835599320.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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
stream_004_off000051f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F3 24864 bytes
SHA-256: d6daa275805e0d8ddda1bdd714cd6d728273b5f2bd26c6b029f6ba54daa49abd
font_01_sfnt_off00008a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A85 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9438 19996 bytes
SHA-256: c72884803e36781e2f9945a3e2845b221158b77200d82611f649ddff5d510e17

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