Malicious PDF — malware analysis report

Static analysis result for SHA-256 1813b7127ed57b3f…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 12:51:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f08c71c411594559880d9e0e28c8a4d2 SHA-1: 35c69d35015941c94cc757a498d2e50e96f6eab8 SHA-256: 1813b7127ed57b3fe7f34d21ff038cb81c80d92198fad8f6cdf2acec9cec2bcf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document's structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/get-free-robux-2021-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-its-free-advert_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3254 22196 bytes
SHA-256: eea07b62b5b6e4fd3dc18e37077ef4e6e0c9b68530ad084e0d3800e1e3ffd1d9
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 19224 bytes
SHA-256: 821bcaeb5baca65cbb25255ca6205972482cf4d6c0082e9a42268983cc7c06a1

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