Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a825fe64fb1985e…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 14:17:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 982fbb604ee217c01a87c4f5ae765b5b SHA-1: 3d3dd33a5ce6537b0d6d7c28ee0dcf7b951f42fe SHA-256: 2a825fe64fb1985e62ebd23d67b3f520e9e4bcd0d8a4b3ed9ee5f8a5ce4b3180
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically disguised as 'game hacks' or 'free spins'. The document body and heuristics confirm the intent to redirect users to potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites.

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 https://netcdn.xyz/app/479516143/minecraft-hax-download-no-virus-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-adopt-me-hack_GM431946152.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_003_off000049ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BA 31820 bytes
SHA-256: 82c95af4516625bbb84c88041175f2d03967774acd5d48f153cbe6d02715dbfe
font_01_sfnt_off00008c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0F 18772 bytes
SHA-256: c700757df4146bcd75611d33c41ed0aca4ff62925dbc333fb331944c4ea3b8c9

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