Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca3f107d92eef7d…

MALICIOUS

PDF

44.3 KB Created: 2021-06-09 13:06:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 35263e512753ae9421cca4a107448c46 SHA-1: 4f0bde4799c94a0d1f4fc751092bb52541a40652 SHA-256: aca3f107d92eef7d047f4b5c1242618e65272da000d3bce75689a0ccfee0b01b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a 'free generator / game hack' website, indicating a lure for users seeking in-game advantages. The document body, though heavily obfuscated, contains references to game hacks and generators, reinforcing this lure. The presence of numerous embedded URLs, many related to game hacks and cheats, further supports the malicious intent of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-girl-faces-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/is-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-game-roblox-apk_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/tiktok-for-free-movies_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-generator_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
font_00_sfnt_off000050e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50E6 24848 bytes
SHA-256: a594180da9d900ff184f973e9f165f38267a1a649bba0823262acbcd933a36ef
font_01_sfnt_off00008a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 18296 bytes
SHA-256: 69caa974c0e55678eaf9ba91a8267b145878b848fc4be2ce2ae967898c637949

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