Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dcb128c4558ac1…

MALICIOUS

PDF

44.7 KB Created: 2021-05-20 07:01:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 91a11df9f3601cda64743588a989a71f SHA-1: 9455bd24c61a2f89b719aea72611b3f7f7311416 SHA-256: 96dcb128c4558ac17835947fb5286e3cf3cc6d609587fc932fb80afd1b4edabe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to redirector infrastructure, including a primary link to 'coinmaster-spin-ml-game-hack'. This infrastructure is known to host lures for game hacks and free in-game currency, designed to trick users into clicking. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coinmaster-spin-ml-game-hack In PDF document text
    • http://www.sapaengineering.kz/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/roblox-system_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-robux-stream_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004848.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4848 25584 bytes
SHA-256: 1e8ec50217341fbfb554f162fc891db6c8f40033a8908177f19dd15c8c231c16
font_01_sfnt_off000081ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AE 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD7 18056 bytes
SHA-256: 064134117864f7541fed544d899877d9437d618d81879e9055ccf00f3d226253

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