Malicious PDF — malware analysis report

Static analysis result for SHA-256 132910c1e7881f21…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 16:15:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 38ea6a18602e4752c0ab929ae43c1549 SHA-1: 75025c64550ca4c764831a8ee210de71f2b3fb25 SHA-256: 132910c1e7881f2122af7c67bc507f8447cfb87ab1bf62fe056b62fa62aa0146
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a 'Robux Generator' scam. The document body and heuristics indicate a lure for free game currency or hacks, which is a common social engineering tactic. The embedded URLs are the primary indicators of malicious activity, leading to known redirectors.

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/robux-generator-without-human-verification-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/without-tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-really-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-robux-2021-on-ipad_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/project-pokemon-hacked-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-easy-without-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-apocalypse-rising-roblox-2021_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_off000030b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B0 21872 bytes
SHA-256: a39d5f9b4b445490a1d18d5bec803b9c1f5b0aecdbaeb10578f8134dd7b46dc7
font_01_sfnt_off000060ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EE 19936 bytes
SHA-256: ea759af22d090c98ec9b2735e9990e38e48e197643852080404e6bc21dc44a84