Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0b27cfae774ffc…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 11:40:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01ae6bdc0315237ad5846d7810723404 SHA-1: d1f728c461d021f506fecde3ca8ecaecdd863d17 SHA-256: 1b0b27cfae774ffcc4d1a016c056e094347580b3bb46b404c460c9acdd3c525f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a primary link pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for "free generators" or "game hacks", suggesting a social engineering tactic to trick users into downloading further malware. 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/406889139/hacks-for-coin-master-game-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/itos-fun-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/gift-cards-for-robux-free-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-robux-download-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-booga-booga-cheat-engine-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/best-games-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-bedrock-edition-free_GM479516143.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_off00002e47.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E47 22380 bytes
SHA-256: df555aaabb8f781fba0fe9e72336662b3efdd9b396a181695152568556677ce5
font_01_sfnt_off00006082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 18428 bytes
SHA-256: 3b81655d79e26380ef92b5d1af1222301b698fd41e2345ada85b37715d726562

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