Malicious PDF — malware analysis report

Static analysis result for SHA-256 f502ebca8fd5efa8…

MALICIOUS

PDF

36.5 KB Created: 2021-07-04 08:55:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 76a40911ed278c1ff92cdb4eec9afead SHA-1: a3e990b96d4d734437d6671e32e3c06f8abf6271 SHA-256: f502ebca8fd5efa8d62a71b9c8e986cd5c2d0b3e74d8b54b14ff721cecb43883
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a 'free generator' or 'game hack'. The document body and heuristics strongly indicate a social engineering lure designed to trick users into visiting malicious sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the PDF structure and embedded links are sufficient to determine the malicious intent.

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/431946152/free-robux-no-verification-2021-android-game-hack In PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/easy-robux-today-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/without-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id//repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-free-robux-for-wiewers_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/best-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/games-you-can-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.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_off000033f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F4 23080 bytes
SHA-256: 3c679fe28a5d83eff46fed4b93eb065d06bf4a576d0368a2d7fbfbf7b6623948
font_01_sfnt_off000067f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F4 19648 bytes
SHA-256: fddc38f60f29949e87a17df7f7945f6cf104ea1bd46a51d994ebbbbf43946b8f

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