Malicious PDF — malware analysis report

Static analysis result for SHA-256 30611cbe089b16f9…

MALICIOUS

PDF

46.9 KB Created: 2021-06-04 01:51:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cd34293ed626b135248d97b6104eacc3 SHA-1: 09f5cdd43ede3d98980a580d1a898d05bf7e1d99 SHA-256: 30611cbe089b16f979b1cf212e670159c8aaad68c8e32f341f045ac776d6443d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators." These links are designed to trick users into visiting potentially harmful websites. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/479516143/how-to-get-minecraft-java-for-free-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-juwelen-hack-mad-paintball2_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fcc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FCC 26068 bytes
SHA-256: a595ebc29da76d370e556234a74ff445fe3300cd716b0ed3e7b7bf145c9141a3
font_01_sfnt_off00008aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAA 3000 bytes
SHA-256: 618d4c09a3c2ff901aaf0c9862d0ccec3617eb75f0b5c7e1b68908377e6492c4
font_02_sfnt_off000094fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94FB 18152 bytes
SHA-256: f45ec97da20a8e70f6e7437c3ced33d3bcbd99aef5af4daf3be0ff08d51a9e58

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