Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a6608ff4e031b1…

MALICIOUS

PDF

47.0 KB Created: 2021-05-15 01:24:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 07f458b892f731c735739cea16fdb016 SHA-1: 18e4e2592a01b9ff2987e4fa9c3110512b61288d SHA-256: a4a6608ff4e031b18c558b6c600bf432cbd5133415baa12a9c6e15925961d460
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' and 'game hacks'. The ML classifier also flagged this PDF as malicious. The embedded URLs are designed to lure users into clicking, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/static-moonactive-net-rewards-2021-game-hack In PDF document text
    • http://dieter-sauter.com/images/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/robux-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B1 29748 bytes
SHA-256: 819ca1d05a2f2c940860b482562b2f1278918ac0a9613cbace67c2d125537018
font_01_sfnt_off00008b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B06 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000094b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B7 18400 bytes
SHA-256: f58e347b836052213ef30a7590f1dd7765bcf8cd7de7ad9ce96baa8761e8ab4d

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