Malicious PDF — malware analysis report

Static analysis result for SHA-256 baed83a7d33bc884…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 11:22:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9a9e9fd7a289affc5a5a9225b019d2ac SHA-1: e0b865d61d00c71ba3fafcc6c2c5abf87a6a47b4 SHA-256: baed83a7d33bc8841cb60355567e9e73b755b48b178ebcb44d44a67fdb895d06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as a lure for free game currency or hacks. The document body and heuristics indicate a clear intent to trick users into visiting these malicious URLs. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggests a potential for further malicious actions upon redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/free-robux-with-no-verification-game-hack In PDF document text
    • http://oca.undil.tl/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/pokemon-go-free-apk-download_GM1094591345.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-free-tiktok-followers-no-verification_GM835599320.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-attack-madness-hack_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_004_off00005122.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5122 28288 bytes
SHA-256: 5ebda0bce5efb8a212fd3602ccc34cdc7f5bcdb600dca804ee6b38f8f10051b8
font_01_sfnt_off00009188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9188 18964 bytes
SHA-256: 882e97bebd076dae688415b0184bb224dca7d5b64082a0b27c077a0c76cfc979

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