Malicious PDF — malware analysis report

Static analysis result for SHA-256 3720c612b2ae8be3…

MALICIOUS

PDF

38.6 KB Created: 2021-05-23 17:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fae7482c941cc9ce9fd7abc3429bd8d8 SHA-1: c88d0621f53647ddf07ec5c5d92e665144889b84 SHA-256: 3720c612b2ae8be3cd975c8e91f8c74c570850617d3e9ab7f3c508a682f54d6d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple embedded links and a call-to-action button, directing users to a known malicious redirector infrastructure. The document body and heuristics indicate a lure related to 'free game hacks' and 'free skins', combined with a remote support tool pretext. This suggests an attempt to trick users into visiting malicious sites or installing potentially unwanted software under the guise of obtaining game-related benefits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/how-to-get-free-skins-in-minecraft-game-hack In PDF document text
    • http://www.aqas.it/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.aqas.it/images/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.aqas.it/images/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://www.aqas.it/images/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://www.aqas.it/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.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_002_off00003453.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3453 24892 bytes
SHA-256: 274f590487aecea76e26113149f0207e2e3ae76aa651ffe6b591a3efcf9bfe3b
font_01_sfnt_off00006c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 3128 bytes
SHA-256: 801f6fa60decd1add2f223f91580103c35e150c924465f86a7a572b3e00674f9
font_02_sfnt_off0000763f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763F 18044 bytes
SHA-256: 6cc59c28d5557832b1af72f7b0f143d8adff3a85e9aacd177c0586c4e7a11f45

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