Malicious PDF — malware analysis report

Static analysis result for SHA-256 917f70a71bd3ddf7…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 07:51:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5c8d99ade67b6639e4f9ad5129a2cfb8 SHA-1: 3633ff0fae5e1b111dca9864f0745a70dbf31c81 SHA-256: 917f70a71bd3ddf7fd87f70597f3bd18a0372942790440f2b8e7ad77538ab3d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and in-game currency generators. The primary lure URL is http://netcdn.tw/app/479516143/how-to-get-minecraft-pocket-edition-for-free-game-hack. This indicates a social engineering attack designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the document structure and embedded URLs strongly suggest a phishing or scam campaign.

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/how-to-get-minecraft-pocket-edition-for-free-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-easily-get-robux-for-free-on-a-phone_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/como-ser-hacker-en-roblox-xonnek_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-accounts-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-free-custom-song-game_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-code-generator-tool_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/fond-dcran-gamer-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/www-free-robux-generator-com_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
font_00_sfnt_off00003320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3320 22568 bytes
SHA-256: 2bf97566d5fbb0cc2b743c1fb5f342baa123747c038071b6da30a4d3c50acc4c
font_01_sfnt_off00006568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6568 18660 bytes
SHA-256: b13a25137ff5bf184941611dadd5274b7697b7880b48ae01eb7c808e4237078c

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