Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa329dd80b79ff38…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 11:09:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8e871f021c24673603ee8b69be3008bd SHA-1: b5ad0270c499c18980034b99e686aa55848bdfff SHA-256: aa329dd80b79ff3876b3bf57586eefcaf8d681b5db67c9c7b2a2f377ead6fc59
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded links that redirect to malicious infrastructure, specifically advertising 'free coin game hack' generators. The ML classifier strongly flagged this PDF as malicious. The document body and heuristics indicate a lure for potentially unwanted software or scams, likely delivered via spearphishing.

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/free-coin-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-how-to-get-free-robux-without-bc_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-codes-on-roblox-assassin_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/sites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/pubg-2021-uc_GM1330123889.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-cards-for-coin-master_GM406889139.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_off00002dff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DFF 23036 bytes
SHA-256: 78d59a06d176d103da7470fdc57bb8dbd53102be0b59e3457bfd9a35c15397f9
font_01_sfnt_off000061ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CE 17896 bytes
SHA-256: 30b91f0cf14a5514f1df58b1ea6b750ab9fcef30665dc7be89d866611abc7228

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