Malicious PDF — malware analysis report

Static analysis result for SHA-256 969f49a60c726030…

MALICIOUS

PDF

46.7 KB Created: 2021-06-10 20:05:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d7bc4353d39c97b22dcd009356736efb SHA-1: 3ae26474f4d120d62810fa6bcc16ebd201903186 SHA-256: 969f49a60c72603071a4d27fa9513107a99f143e56baaeb4a9831833ac2aefd3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that offer 'free Robux' or 'game hacks', indicating a lure for users interested in such topics. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous links suggest this document is part of a link farm designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the nature of the links and the lure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://netcdn.tw/app/431946152/roblox-robux-code-generator-download-free-no-human-verification-game-hack In PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/como-ganar-robux-en-roblox-sin-hacks_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/roblox-blockburg-money-hack-penquin-gui-script_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-get-the-stylish-animations-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/follower-fr-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.thecongostore.com/uploaded_files/userfiles/files/earn-robux-today_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_off0000555c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555C 26144 bytes
SHA-256: 94fd32acccd9c5748aba895eb05db330b39906891cbfc39ea8830b4e323976a7
font_01_sfnt_off0000908f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x908F 19440 bytes
SHA-256: 6e2c806f965c35c6e2a520500bfb3be0e1a837bb502cfac5651ed3689fb4631c