Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5f866ee4825b2d…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 06:12:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4c771cc127cef0630570d4d33266ee4a SHA-1: 7494dfa92406eca29b8e6e764c644dcae30b375a SHA-256: ef5f866ee4825b2da45e8c45b6e212e195ab8019431f33599569ba402e06a496
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The document body, though heavily obfuscated, contains URLs that are consistent with this lure. The primary attack pattern involves tricking the user into clicking a link that likely leads to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-free-install-game-hack In PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://perpus.sdmtenggarong.sch.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://playhack.in/minecraftIn PDF document text
    • https://code.giftcards.comIn 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_004_off000053be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53BE 24880 bytes
SHA-256: ae7e9d385badb5246c4d9ee33b52fa159120f2e1b8aec7fce36b61a8e7582e67
font_01_sfnt_off00008c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C00 17644 bytes
SHA-256: 633b33bb140344f1759210963491f1aee0e41bd13e53d96deaa22883d252c2f8

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