Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2aca0315e34caf…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 15:46:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1e53478accbceb0e243478c94bd3d75e SHA-1: 0f9ff7d11b6f3a3fc94b172c25db760a9e745a2a SHA-256: 2c2aca0315e34caf1bc19bac0bd7f44bf30ccd6fded484b4127e38fe548c4397
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs that redirect to a malicious domain, masquerading as a generator for game currency. The heuristic firings indicate the document is designed to lure users to this malicious infrastructure, likely as part of a phishing or scam campaign. No scripts were extracted, but the presence of malicious links and the document's theme strongly suggest a social engineering attack.

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/431946152/roblox-e-free-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-rixty_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-longest-super-fun-obby-cheats_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-money-hacks-with-lots-of-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-working-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-gamepass-e-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-codes_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_off00002d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D81 22016 bytes
SHA-256: 5d46a492d57e3fbc9bb285410b23cd7cd41f7d8c8247df3a9886ed43bbd77fef
font_01_sfnt_off00005e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E73 18652 bytes
SHA-256: 3b717e1c0305f9ef7a080788cc27b45412002dc45b03d0bdaa6807dc7aac4704

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