Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1fdee11bdc2963…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 06:26:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fa1c677ae7d033c8014408fcbda48616 SHA-1: 2d1cec769fcb710ba95c59ffeb675c567cf62412 SHA-256: ce1fdee11bdc296341fdca0efd37bfe32e90403db9b024e5e523206d78ed9beb
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a social engineering attempt to trick users into visiting potentially harmful sites. The 'ClickFix' heuristic suggests the document may also instruct users to manually execute commands, further increasing the risk of payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/free-minecraft-maps-game-hack In PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-online-free-download_GM479516143.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
stream_004_off0000500a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500A 25208 bytes
SHA-256: 2da9eaa5bc65cf9760ef1c4d7c5b88354911124d5ed2cd121db17d599332fc97
font_01_sfnt_off000089bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BB 3092 bytes
SHA-256: 1aa0e4457f2fdbd20c643bc065edafaa683fd9dc2930c01c4492bce0fd9a7f02
font_02_sfnt_off00009467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9467 17744 bytes
SHA-256: 642e76b92f67015eb87e7bb2f8978493590a3d76ebc6958dd5b149369a6bd5f2

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