Malicious PDF — malware analysis report

Static analysis result for SHA-256 a042ba99de2e71a9…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 18:23:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 69764c1ae3d8c27eaf08530e3e24d0c7 SHA-1: 4d9018ce7c081b2be0f39ef52c51375823c1ad55 SHA-256: a042ba99de2e71a9d8b30c80c45225b888c6267e5718276367e3ceeb62e0d696
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting a 'free game hack' lure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful websites.

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/minecraft-win-10-free-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-come_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/rbx-earn_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-www-com_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_off00005188.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5188 25152 bytes
SHA-256: ceb5fc5ba49134f108a67333eb9699f162a558b1f26cb4b867646449ce384564
font_01_sfnt_off00008a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A87 3092 bytes
SHA-256: 1aa0e4457f2fdbd20c643bc065edafaa683fd9dc2930c01c4492bce0fd9a7f02
font_02_sfnt_off00009533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9533 18044 bytes
SHA-256: 8c18055e18e603d9435ca6119687fbcabefed8c156a2aaa85b6717beca9cc20e

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