Malicious PDF — malware analysis report

Static analysis result for SHA-256 560a35f8ff2cffc9…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 11:01:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 16f9a347ff31ef5baa5db4cbf3c24a2a SHA-1: 7aab88d73368b8c33cb016f3b242bb5f70c11239 SHA-256: 560a35f8ff2cffc9804864391ee3fa82c6e96cee1405cee585a52eae53f052c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generators' and 'game hacks' for popular games like Roblox and Minecraft. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous embedded URLs indicates a high likelihood of leading users to malicious sites for further exploitation or credential harvesting. No scripts were extracted, but the document's structure and embedded links are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-skin-free-game-hack In PDF document text
    • http://maxvanberchem.org/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-easy-no-download_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_off00004a3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3D 26192 bytes
SHA-256: e0d1070bdce7a0fdd3c549c440d487c95d2b8e33e04ba7a740fd751cdb35184c
font_01_sfnt_off00008690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8690 18236 bytes
SHA-256: 6f613c146b2caf8aa71dfdba399286dfcc190b8555f8633d10d72eb14be7938a

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