Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8f961a418acd56…

MALICIOUS

PDF

40.7 KB Created: 2021-05-13 03:03:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9fc33b57f0bdf86753d752480bca500b SHA-1: 69562f15e9318322b69af525e7ca740f8af26851 SHA-256: 1d8f961a418acd56286cde051c2532ff702dcd242443fd130d3bca8ee999376c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting "free spins" and "hacks" for games like Coin Master. The document body and embedded URLs strongly suggest a social engineering lure designed to trick users into visiting potentially harmful sites. While no scripts were extracted, the presence of malicious redirectors and the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-spins-1-coin-master-game-hack In PDF document text
    • http://gruporamos.do/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-coins-and-spins-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_003_off00004675.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4675 24548 bytes
SHA-256: ce552f7bb7381d0d9a579b63ff1504a1a76ddbe3100316f35f7dee7107de8653
font_01_sfnt_off00007dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAB 17992 bytes
SHA-256: 6d8d99a319dc3508354c514a9dfb36b9314a67d789b860417dc5e127b03e5453

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