Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb787d9d6bfc594…

MALICIOUS

PDF

33.7 KB Created: 2021-06-23 08:13:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a3f931c280104875dd2a79ada4829c71 SHA-1: 5a2099f07ebf02c88e02a3445e518809fc137702 SHA-256: 1fb787d9d6bfc594d32f6093e45a13c0179f740a8c9a6385ba4e25af765637c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a malicious redirector URL. The document body explicitly mentions 'Free Robux By Oints' and includes the primary malicious URL. The presence of multiple PDF-specific heuristics indicating malicious redirectors and game hack lures strongly suggests a phishing or scam attempt.

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.co/app/431946152/free-robux-by-oints-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/tiktok-free-view-30_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/outil-script-mad-city-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-robux-hack-ipad_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-cheat-robux-in_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-credit-card-payment-download-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/pokemon-go-free-online_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-500-spins-link_GM406889139.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_off00002c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2F 22456 bytes
SHA-256: 8bf942f40b8b84232c2caeac1daf52de594287dce76cbce2d58d163cf29819f6
font_01_sfnt_off00005e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 19120 bytes
SHA-256: 75d1eb736f0678a335c8580991fd014f7361a5708620b1fc6e6c3894e8c92c54

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