Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf3cf120aa53ca3…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 05:03:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 72912a2d1cb1863b37d0e00c92eab6d8 SHA-1: 03f4565d0dc774cda40be99a96c5e58a92b3e385 SHA-256: cbf3cf120aa53ca300cb35696e0f09c7bbedc9ebd8f2c79efd1867fc381871a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains links that redirect to a known malicious domain, masquerading as a game hack generator. The document body and embedded URLs suggest a lure for users interested in game cheats or exploits. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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/coin-master-levels-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-roblox-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-robux-hack-generator-download_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-free-download-pc-microsoft_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-fe-games-roblox-v3r_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-the-robux-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-hack-2021-working-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/hack-to-not-die-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-without-having-the-vera-cage_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/html-free-robux-30_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-accounts-free-robux-and-obc_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-2021-pc_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_002_off00003134.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3134 23292 bytes
SHA-256: ef639ec83b1050f7ca708972408bba7fb05791b2c4dc8635e942e8c622d445ae
font_01_sfnt_off000065fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 18024 bytes
SHA-256: b6131d1dd2016611f11330ce97fedba8153a896dcc449af2ff89976c47f4ce14

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