Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8cf0869cbd2c430…

MALICIOUS

PDF

43.4 KB Created: 2021-06-13 18:39:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4752b907df5c14901ce327e3aae1eb46 SHA-1: deb66e40ae83271704e38f45464ba85a8edbc366 SHA-256: e8cf0869cbd2c43018fa4011b0c21f5df15471af7634f90a5ca2abaee2db2f5d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, disguised as 'free generator' or 'game hack' lures. The document body and heuristics indicate a social engineering attempt to trick users into clicking these links, which likely leads to further malicious content or malware downloads. The presence of multiple related PDF files suggests a campaign distributing similar lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/free-minecraft-realms-to-join-game-hack In PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/pokemon-go-free-999_GM1094591345.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-hack_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
font_00_sfnt_off00004ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE0 25136 bytes
SHA-256: 80cba82540e89fec6453024a43cac976912d3b0460b059114c4ce9acdd0eaac6
font_01_sfnt_off000087dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DD 18208 bytes
SHA-256: 07ea4a0a65e268d617c6aeb2efc29ec1284b659111274d24dd89fc4161b37103

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