Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5414bdd6b787698…

MALICIOUS

PDF

48.5 KB Created: 2021-06-13 19:40:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9546177ab732a7d7515e7ae39cacc4f8 SHA-1: ac9f255e69a646e40698cbfa1c0f59a6311dc134 SHA-256: c5414bdd6b7876988906ed04a47cb825bd0738f17c2cd461c9b1f3072b47cb06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, under the guise of providing game hacks and freebies. The document body and embedded URLs suggest a social engineering lure to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.co/app/431946152/how-to-hack-roblox-jailbreak-game-hack In PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-online-roblox-death-games_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/tiktok-free-online_GM835599320.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-no-catch_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/avatar-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-2021-iphone_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_off00004f09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F09 28576 bytes
SHA-256: 9974e42207424917886ae9deffc31bcdf52a0760baa98b05ee67d7bf48871b86
font_01_sfnt_off00008fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC5 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000099b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B0 18820 bytes
SHA-256: 42d619bfa2d98cd09d5b15aa702dcf8b5b24d74fefac4493bd97c4fa57fa7e4d

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