Malicious PDF — malware analysis report

Static analysis result for SHA-256 de25cc0695c6774c…

MALICIOUS

PDF

51.4 KB Created: 2021-06-09 04:23:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: caa456090190ddae517e97c71ba52c68 SHA-1: 51840064e7cff752e87fbc6f514a9a0739a9d978 SHA-256: de25cc0695c6774c03edc3cbed475caaccfb948b0c6ea0684afc41c359a9f9bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator' and 'game hack' lures. The primary redirect URL, https://netcdn.tw/app/431946152/free-roblox-script-builder-scripts-game-hack, is a strong indicator of a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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-roblox-script-builder-scripts-game-hack In PDF document text
    • https://www.romedia.gr/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-robux-link_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/how-to-get-free-faces-from-events-roblox_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/fbchampion_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://www.romedia.gr/images/how-to-get-free-likes-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.romedia.gr/images/free-instant-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/roblox-project-pokemon-hack-script_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://www.romedia.gr/images/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/roblox-zone-free-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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005162.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5162 25964 bytes
SHA-256: 2d65d745f820954a57b645db23fc1debd6a3a4dddddd557f161aebc1050036a7
font_01_sfnt_off00008dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD2 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off000097dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97DD 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4EF 18664 bytes
SHA-256: 11a813ade25524e6fd0e46359a78fee803a5f5d5a9bfe527fd2826567dbcf9c4

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