Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e771462bd05e738…

MALICIOUS

PDF

43.6 KB Created: 2021-05-19 04:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 94771150d94a1fa33edfb45c3a9ec562 SHA-1: 1df48167bf1facf017365e33be966b324d702597 SHA-256: 7e771462bd05e738f36b5c5eba02c3c06d8bcac5f25767d503443a309d9e2827
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free spins for games like Coin Master. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple redirector links indicates a clear intent to lure users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering tactic to drive traffic to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/tiradas-coin-master-game-hack In PDF document text
    • https://www.najeebqasmi.com/images/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/get-robux_GM431946152.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/free-800-robux_GM431946152.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • https://www.najeebqasmi.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DA 24676 bytes
SHA-256: e7de04811bb4428d7385021674ca382395c56dac0c7388c66e26d856fe8d5d09
font_01_sfnt_off00007fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBC 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000896e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x896E 17720 bytes
SHA-256: 15d95e48d36938550ee5d4d1f29705b15c24be7e4b7e19dd80ff84a2db447fc5

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