Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d328ea1d1af566…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 20:19:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5089181646369935455050ba8cc92a6e SHA-1: 3659569f4549da3be13474d909d2fda9eb69da70 SHA-256: 11d328ea1d1af5667bd436af639e5d34d5936b6d31fe119784bd01c9cc01fb34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-link-today-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-link-today-game-hack In PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/blox-rewards_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-titan-simulator-hack_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/eating-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-vehicle-simulator-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-just-with-a-app_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/get-free-robux-no-fike_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/speed-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-free-blonde-hair_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003175.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3175 23036 bytes
SHA-256: 0f17aafa60a06d379678aee9d8a5928e6eef85edd636387a1e1469de5d6097cf
font_01_sfnt_off00006513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6513 18356 bytes
SHA-256: a0a0724bc66754c09fd06c8492cc7e1865f42ab17c8ab237f13f9486378ddf6f

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