Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2c047928dff866…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 16:39:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7f5cd1257258c1d4db71106e6f41486a SHA-1: 38218b49c360a8be3e376b60c51a654d0dd7b526 SHA-256: 6a2c047928dff86613d7dcde9ca930d60176052a275c0d32a82e37bed4bc88f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free generators" or "game hacks" to lure victims. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms a malicious workflow. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/free-robux-safe-game-hack In PDF document text
    • http://blueduna.com/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://blueduna.com/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://blueduna.com/images/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://blueduna.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://blueduna.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://blueduna.com/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://blueduna.com/images/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://blueduna.com/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://blueduna.com/images/coin-master-daily-free-spins-link-today_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_003_off00004736.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4736 27064 bytes
SHA-256: 7a6e18b742dac08d50abe04bdc5d9add2f646c005bcca2d6610038f04f25b202
font_01_sfnt_off000084a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A9 18244 bytes
SHA-256: 393a0339ec2761f14ea9b29efa8c9c5fc9788b4979bd41a030a3ecef46023b5f

Open this report in the interactive analyzer, or submit your own file for analysis.