Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e63d1fba539e785…

MALICIOUS

PDF

45.2 KB Created: 2021-06-09 11:10:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1097e41a5970cf907467487dc82709e5 SHA-1: acb5366db8147d7ed966f6b8ab5cdc71ca75206a SHA-256: 9e63d1fba539e7854e90a894ab5947deb6f243ec173675c7e49ec5d908353d9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising 'game hacks' and 'free items' to lure users. The primary redirector URL is https://netcdn.tw/app/431946152/free-white-pants-in-roblox-game-hack, which is associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely leading to a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-white-pants-in-roblox-game-hack In PDF document text
    • http://vedrachemicals.ro/images/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/youtube-how-to-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-stuff-roblox-id_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AB 25180 bytes
SHA-256: cf0926127bc3067d27f529137f792196886b8a5abdddda82204f60a90d41d937
font_01_sfnt_off00008c42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C42 18916 bytes
SHA-256: 5c5b39057e88b99785140fec34bf206682ec62f8fff9a5cf705e494903f52490

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