Malicious PDF — malware analysis report

Static analysis result for SHA-256 266c300c49802632…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 09:07:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 14f9432f4c0966cdb4060c195792002d SHA-1: c5077d69a09ded36892a540f9f78af41d36c22cc SHA-256: 266c300c498026327546222821a508229c1fe00f32b5cca55cecdcf479bec6c0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to a malicious domain, likely serving as a lure for game-related cheats or hacks. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm designed to attract users. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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/coin-master-hack-mod-apk-35-8-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/free-workink-downloadable-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-hack-on-roblox-murder_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-admin-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-roblox-accounts-with-passwords-and-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-cheats-tool_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-hack-mpgh_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/difference-between-hacking-and-exploiting-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/pokemon-go-free-coins-promo-code_GM1094591345.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_off00003101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3101 21920 bytes
SHA-256: 48e8ad362b895795a5ca3e827f05b86c5ea9871204574744013cd6994541693f
font_01_sfnt_off00006153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 18872 bytes
SHA-256: f8f88724432d8d9f28d7b314fb7cacf118717b6639cfc779c614c4dfb23bb782

Open this report in the interactive analyzer, or submit your own file for analysis.