Malicious PDF — malware analysis report

Static analysis result for SHA-256 b549d3e116fce614…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 14:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3a31b383adf3e7566d0542c0276545c1 SHA-1: 65e7fb53c0962a75a9ac36bc8556aa0206c46d90 SHA-256: b549d3e116fce614a228b0848f902038202fd2af9f5c1fdd9567e7e0b776b862
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors and infrastructure, disguised as "game hacks" and "free spins". The ML classifier also flagged this document with high confidence. The primary goal appears to be directing users to potentially malicious websites for further exploitation or phishing.

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-hack-iosgods-game-hack In PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-cheat-engine-alternative_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-4-now-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-codes-for-cheat-engine_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/tamper-monkey-roblox-hack_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-redeem-code-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/any-working-robux-hacks_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/robux-hack-gratuits-apk-mods_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-prison-life-cheat-engine_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/corn-master_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-roblox-accoiunt_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-for-kids-no-verification_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_off0000349c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x349C 23108 bytes
SHA-256: 713730f80599eb024e544474f4015150233f80a8463cc4fd2c3b08b2c079f961
font_01_sfnt_off00006867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 18180 bytes
SHA-256: 835919d68baf365dee2eb3881849910c3802b6bb08bb8f403bb4b70701c61443

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