Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b71480ea38ffc9…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 22:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11e470a3a2c3db83a0fd99a7b1e83c6b SHA-1: 3b08e853289f7e724d690c69509cd7f618e327bc SHA-256: b2b71480ea38ffc96ecb037f78b0b1ec76eee13b40e1f2c23d52ecfccf420a1e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically promoting a 'game hack' lure. The embedded URL directs users to a site that likely hosts further malicious content or exploits. The ML classifier also strongly flagged this PDF as malicious.

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/479516143/minecraft-cheats-switch-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/code-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-dragon-ball-rage-all-gamepasses-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/downloader-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-tix-factory-tycoon-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-games-that-actually-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-2021-may_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/naruto-rpg-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/cheat-roblox-prison-break_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-latest-version-nerf-fps_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-bloxburg-free-money-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-injectorscom_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/youtubecom-ultraw-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/mc-the-miner-free-robux_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
stream_002_off00002ea2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EA2 23292 bytes
SHA-256: 5e9f49c4721fdbcaf47cc78ba70fb2a75d5b1570254a43d4ac1b0054784ba7ff
font_01_sfnt_off000062bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 18188 bytes
SHA-256: 9dde8f36e51ad3ff5b291f9872cd341ba17df7b948e3e3937f7bc458e100ef84

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