Malicious PDF — malware analysis report

Static analysis result for SHA-256 e945769542c0ad3e…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 12:36:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 55c6352eae343027c82edfc06f86869c SHA-1: b4d9e4db3ca62d387be545382a5929f733c1bd02 SHA-256: e945769542c0ad3e945b325ca8a7750717a89bb58355a5035d8dae8d3541a432
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links disguised as game hacks and free currency generators, with a primary redirector pointing to a malicious domain. The document body and heuristics indicate a lure to download or visit sites that likely host malware or phishing content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-33-hack-version-download-game-hack In PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-on-iphone_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/free-roblox-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/how-to-cheat-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/how-to-make-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/free-roblox-shirts-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://learning.mtsn1pnd.sch.id/__statics/gudangsoal/files/hacker-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3207 22392 bytes
SHA-256: bb6e2e9cabd6c8b2a2222d4e4c36e766d80fcb01b897a9a71878f4b40bac2ae3
font_01_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 18892 bytes
SHA-256: f82df0c1e2fbcbb0c2c780d78a028565b07f50366ce62e1ff7d6d7c03855aca0

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