Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff20f2fffac0f1af…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 01:58:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fd26753e76dfbc0523e419bd5f0e190c SHA-1: 876ddcac288665b2a9e87e73f922e4b261083f45 SHA-256: ff20f2fffac0f1afdfe880bcc3224b355b2b368cea2d660b402601658daf9a3b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link disguised as a "game hack" lure, directing users to a suspicious URL. This suggests a social engineering tactic to trick users into visiting a potentially malicious site. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-spins-for-free-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.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_off00004d84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D84 24256 bytes
SHA-256: fa29f16534d6dc2f9c8952019dd6a4cb0e8beb0acbafb7a53513ca1cca57c27e
font_01_sfnt_off000084dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DC 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off00008e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7A 17884 bytes
SHA-256: f64f8d8cd546afe107dcd88d9ce91258665e3d619825ef5ba403a2abc0c27184

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