Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3258d6ccc85f4f6…

MALICIOUS

PDF

47.7 KB Created: 2021-06-04 03:46:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 44749b92277196269fee2e9e693554ac SHA-1: 3f254f44d395f434aa5a1506a47dd8dfb35cca44 SHA-256: c3258d6ccc85f4f69457ed77364783545a3aafe51e4a674508e54db101b98d3e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure URL is https://netcdn.online/app/479516143/cool-minecraft-hacks-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/cool-minecraft-hacks-game-hack In PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-free-robux_GM431946152.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/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/20-free-spin-link-coin-master_GM406889139.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_off0000560b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x560B 25116 bytes
SHA-256: 1691c6b4009a8881a40cee23aafb8623497abb7f3410efcae5bc0968ff7a913d
font_01_sfnt_off00008f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F07 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000098ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BA 17956 bytes
SHA-256: 052a8056d5e76bd054e8f6de415126dc7fc526d2c477c3dbde74b8be28c4271b

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