Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b3ba3ad1de31ff…

MALICIOUS

PDF

34.9 KB Created: 2021-07-07 03:33:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b47d3e6ae39e6f4ae4cf5bc0e7d3a3d5 SHA-1: 843d20009271a3caff341150fee26055cfbdbb06 SHA-256: c6b3ba3ad1de31ff4dfa84426bf617e3632369120ce8586d55fc69cf42e48cd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and other PDF files, all related to game hacks and free currency for popular games like Roblox and Coin Master. The heuristic firings indicate that these links lead to known malicious infrastructure and are designed as a lure. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/ww-roblox-come-game-hack In PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/roblox-hack-kostenlose-robux-ohne-handynummer_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-to-get-free-robux-rblx-gg_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/hacker-music-roblox_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/legendary-football-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/where-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/roblox-com-cheats-for-tix_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/roblox-free-gamepasse-script-2021_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/boku-no-roblox-hack-script-auto-farm_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/change-your-roblox-username-for-free_GM431946152.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_off00003235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3235 22120 bytes
SHA-256: a6d6500a0f27256e4526aa8ed719557056c312bcf356181c2824e9c2abd8d88e
font_01_sfnt_off00006349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6349 19108 bytes
SHA-256: 90580883745e156586b97c3ed689431169c004bf7d7dde53d905db1a3f24cb6d

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