Malicious PDF — malware analysis report

Static analysis result for SHA-256 036eac9fc8374734…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 12:33:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c51c988184006bdd806b4370dfe8440e SHA-1: 7b6e43756d5367676ac6cdf13f1e836a087bfd24 SHA-256: 036eac9fc83747348d9484c8c5c9bb7cfd873af866996e92716ada4e039d3765
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary link pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure related to game hacks and free generators, likely intended to trick users into visiting the malicious URL. While no scripts were explicitly extracted, the nature of the embedded links and the lure suggests a phishing or redirection attack, potentially leading to further malware download or credential harvesting.

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/coin-master-gameplay-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-on-phone_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_off00005022.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5022 25216 bytes
SHA-256: d71cbe90cbc8bb537826c95984e5973220e1c558ba1aaca12a399288e10bdad4
font_01_sfnt_off000088ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EE 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000092d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92D8 18236 bytes
SHA-256: ad3c54622fe5860f441fa157cfd09fdd7391131bf21229add7d3bdfc0c26f4fb

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