Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7a60e2f2b81747…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 19:54:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 60660a986c0787cc8cb728aa099f4aae SHA-1: 58890350caeaf3e662a597132e2d8634bf5979d0 SHA-256: 1b7a60e2f2b817473d364b816eb74fb566890a912ad8b160df06f8cee4948fe4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for popular games. The primary malicious link identified is https://netcdn.online/app/406889139/how-to-win-attack-madness-in-coin-master-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a social engineering lure designed to redirect users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/406889139/how-to-win-attack-madness-in-coin-master-hack-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-attacks-coin-master_GM406889139.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_off000051c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C1 24104 bytes
SHA-256: 9bd0eb3652dd8dbd83aaae551f5b7d2ac8f97fe5f6b0c30a85f1935a75e69b35
font_01_sfnt_off00008888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8888 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000923a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x923A 18252 bytes
SHA-256: ebc75091247f42f4d8f6f5328204ee4b219dff7698097371fec03a0e52319ffd

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