Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1acb0f45c9db5e5…

MALICIOUS

PDF

44.4 KB Created: 2021-05-12 15:00:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d06c6938182a111cf488d8af82e2f1ea SHA-1: a23850d4e1455a511fe6cdca31c603fdc15e0b7f SHA-256: d1acb0f45c9db5e57c527c829bb089fd040ecc1b4b73232028e8766a7a400171
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a "game hack" or "free generator" link. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded URLs strongly suggest a social engineering pretext to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/coin-master-unlimited-spin-link-game-hack In PDF document text
    • http://innovativefs.co.uk/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://innovativefs.co.uk/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://innovativefs.co.uk/images/hack-client_GM479516143.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://innovativefs.co.uk/images/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://innovativefs.co.uk/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://innovativefs.co.uk/images/free-robux-gift-card_GM431946152.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_003_off00004901.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4901 25088 bytes
SHA-256: 77ead271c6d3cc9b3360ecfb8b4aa01a559c41ae987d7dd0dbe149649d021161
font_01_sfnt_off00008013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8013 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000089fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FD 18584 bytes
SHA-256: 4b9e97571f76fbd37980e49efa03e4d0776fec80245dbf17b6cc6ba6596e58ec

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