Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f73b4276addaa92…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 23:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a57fd333392141cc3b66f988618b3f6c SHA-1: b6929b1b71bf07223514ba9ca0093f0618477089 SHA-256: 5f73b4276addaa928573d3259532d83b8984a9201ba5e72d1246de0d4da70e42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a "game hack" lure. The document body and heuristics indicate a clear intent to trick users into visiting a malicious URL. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-15-free-spin-link-of-last-5-days-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/tiktok-likes-free-trial_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005386.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5386 24908 bytes
SHA-256: 6e2cbbe3f3e8c2a24c430021c22deaf047c8fa107ae735b0d5d089a4ad09b3bc
font_01_sfnt_off00008ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE8 18644 bytes
SHA-256: 4144dbe1534d0325d37e4c6129895ddb34a2bc26123e242025982d4ceef1bd2b

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