Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5a4ed72d5a4fcf…

MALICIOUS

PDF

41.0 KB Created: 2021-05-12 22:01:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2a57b453091ffcf65a336da2826627a7 SHA-1: af8205e38a15b0eb10d724750db3bd6638f1723b SHA-256: 1f5a4ed72d5a4fcfda9d651473d27563808b8e5fb4d7c2ad3e55d8f8424609a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier strongly indicated maliciousness, and the presence of numerous suspicious URLs reinforces this assessment. The document body, though heavily obfuscated, contains references to these lures and URLs.

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/479516143/hacks-minecraft-game-hack In PDF document text
    • http://solidcommunication.ch/images/free-roebucks_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/roblox-bloxburg-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_off000048d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D5 24292 bytes
SHA-256: cddecc5d68dcb6f00b6cc03b7dd155fe489f5abfceeb644f832d6ec6decf9f34
font_01_sfnt_off00007f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F87 17740 bytes
SHA-256: b4d4c972e4571c6533ebd60601472515a9d19d13ad1d189b55006888a0b23e02

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