Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d60233145838a63…

MALICIOUS

PDF

46.5 KB Created: 2021-06-10 22:24:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ff2de3e309429f26948a7e615dd8a9d8 SHA-1: a4c306706d1f0660532d699b105b2aae22bd5f82 SHA-256: 1d60233145838a63deed9cf06da1e5acf3e9e7b296b52f73e92df6a71b13fce2
160 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free items to entice users. It contains multiple embedded URLs, including a primary redirector at `https://netcdn.tw/app/431946152/how-to-get-free-items-in-roblox-2021-game-hack`, which is flagged as malicious. The document's structure and content suggest it is designed to lead users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/how-to-get-free-items-in-roblox-2021-game-hack In PDF document text
    • http://easytransferbrazil.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-codes-list_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/what-is-robux_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/weird-roblox_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-health-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-giveawaycom_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/how-to-earn-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://easytransferbrazil.com/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • https://rblx.landIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005333.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5333 28604 bytes
SHA-256: f24da99f62ce14d94706ddda7ecf7a2b955eb3e961dfd91eca93d7683ca2c516
font_01_sfnt_off00009145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9145 18876 bytes
SHA-256: 1c9bb8261c89eaf470def65609f284c9b27a2fb10912343b8f6c48227e7ec1dd

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