Malicious PDF — malware analysis report

Static analysis result for SHA-256 24521f4eee3a742f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 18:31:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0b1f9af5f99b79b5488a9233b4062edd SHA-1: 981433be0d5202f8c715dc4e06813bf21007d7a2 SHA-256: 24521f4eee3a742f6eeb15e41130a5931e732696e3694e9fc612202fd20d131f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. The document body and heuristic firings confirm the lure is to trick users into clicking these links, which likely leads to further malicious content or malware downloads. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or malware distribution 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-2021-no-survey-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-money-hack-no-download_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-items-generator_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hacking-discord-server-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hacker-web-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-redeem-a-free-code-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/indidojoe-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-make-a-free-robux-scam-game_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/cheat-engine-roblox-jailbreak-2021_GM431946152.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
font_00_sfnt_off00002e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E52 22152 bytes
SHA-256: fc65e788b7b43e36235c5861e1bcaf7c85a29571203720c1277f6b9ce086f813
font_01_sfnt_off00005f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 19412 bytes
SHA-256: c9104c4712da6d9d978750229b41ef4cad59a0a0e357183ca02746349266fcf1

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