Malicious PDF — malware analysis report

Static analysis result for SHA-256 7849ce799d533300…

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 03:05:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 89a4321bc6053d281cdef8ba00e6330e SHA-1: 4ece52a05788e6e123a6abd981075e47ea185e06 SHA-256: 7849ce799d533300c504efe95ebc3c6905bcafa0a6d1137a0d6c2e283a67eee1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that point to known malicious redirectors and potentially unwanted content, such as game hacks and generators. The heuristic firings indicate that these links are designed to lure users into downloading or visiting malicious sites. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a potential for second-stage payload delivery or phishing.

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/mcpe-master-unlimited-coins-hack-apk-game-hack In PDF document text
    • http://thamelinn.com/userfiles/files/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.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_off000049d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D2 24144 bytes
SHA-256: 9b2d7880b8fd6570280b51ea643cf36c3ca2554ca2f691f4646cf91832b2c73d
font_01_sfnt_off00008100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8100 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEA 18584 bytes
SHA-256: 05a4b74ce365421ded4902af54e34ed44d4f85f1508b60b6eaffe15d5ff07d85

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