Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5aa816648dbf3f6…

MALICIOUS

PDF

33.7 KB Created: 2021-06-28 20:08:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a9959517c37cc3f9114f90e7a39ddbcf SHA-1: 0c511dfa95a275a26260807d7764333e93ce16a6 SHA-256: e5aa816648dbf3f683cff4715807e6ebd56245ad71df84a649f784b81defeb0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDF files. The document body and embedded URLs strongly suggest a phishing or scamming attempt related to popular online games.

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.co/app/431946152/coolkid-roblox-hacker-game-hack In PDF document text
    • http://bw.ac.th/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-hack-add_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/pubg-uc-ykleme-hile_GM1330123889.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/script-executor-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-hack-no-waiting_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-tutorial-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-unlimited-robux_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_off00002ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE2 22480 bytes
SHA-256: f0b6c5ee66a366e113b1bf28c8ce98436ea0206d266b9d247b2b56fe74b44881
font_01_sfnt_off00005ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE1 18952 bytes
SHA-256: 66ef53599f171cdb979cb11369baa7c314b9dfdfb5689f26ea367981d42bce42