Malicious PDF — malware analysis report

Static analysis result for SHA-256 745fd0e444717d77…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 20:56:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6b7b15cac488e5729d28ba96d70e8fe3 SHA-1: 4eb5208d7177a7f0141b8df1ad7cd45f1f320b8c SHA-256: 745fd0e444717d7763fc7b9a0a48a3e2bdef1e8c0212361264e0873bb522c78a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, disguised as game hacks and generators. The primary lure appears to be related to 'Coin Master' and 'Roblox' cheats. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack aimed at tricking users into visiting malicious sites.

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/406889139/coin-master-hackcom-xyz-game-hack In PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/como-hackear-comandos-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/roblox-rocitizens-free-money_GM431946152.pdfIn PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/roblox-party-invitations-free_GM431946152.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/best-robux-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/acheter-des-robux-free_GM431946152.pdfIn PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/hack-robux-in-2021-easy_GM431946152.pdfIn PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://elearning.mysadam.info/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master-2021_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
stream_002_off0000324d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324D 22968 bytes
SHA-256: dc8c979424742fccf9c7547467b4f6847455a591d075faf2e72ba97b7d480120
font_01_sfnt_off000065a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A3 18752 bytes
SHA-256: 06ef631afbecbc1b5b7dcb8b3eb929a8944b6eea579e5c003e5febb126385d8e

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