Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbae5ae1d0f6188…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 13:07:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 157679aea5c41c975640489f204ff904 SHA-1: 17ee4d1ca3e31f2b70d1df4147a5b7253e7f30b4 SHA-256: 0bbae5ae1d0f6188086b8594bb7735ad6de371e4bf56f7dae000deaade7d91d9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external resources, including a known malicious redirector at http://netcdn.tw/app/406889139/free-coin-master-credit-game-hack. The document body and heuristics indicate a lure related to game hacks and free credits, suggesting a phishing or malware distribution attempt. The presence of multiple PDF links also points to a link farm used for SEO poisoning to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-coin-master-credit-game-hack In PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-ban-someone-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/hack-a-game_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/ldshadowlady-roblox-someone-hacked-my-acount_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/follow-people-inyo-roblox-games-hack_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/hack-roblox-click-tp_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/cheats-for-roblox-realistic-roleplay_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/credit-card-hacked-from-roblox_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/pastebin-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/roblox-player-radar-script-hack_GM431946152.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/real-way-to-get-free-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_off000030b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B6 22628 bytes
SHA-256: d9361a1e4f6d5ba596742eb65374464377088b2300d8ccbae829640a9b698fb8
font_01_sfnt_off00006336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6336 18172 bytes
SHA-256: 2fc47c4066dd28e3547f22ef08ec611cc49326c2517731f27ce49f34897b6455

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