Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb3308c5dcd2b52…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 22:29:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b58550755f28127c0ee43bf635add189 SHA-1: 0fb97c2da576a8989dd2c145e76efdaeb3a84f3f SHA-256: 1eb3308c5dcd2b52b2c45893a259e74ef0c482a788b3ef5ac3b402a29246d299
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free Robux and game hacks, as indicated by the document body and heuristic firings. It contains multiple links, including a critical one to a known malicious redirector at http://netcdn.tw/app/431946152/robux-free-gift-card-game-hack. The presence of a visual download button further supports the deceptive nature of the document, likely intended to lead users to a malicious site or download further malware. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/robux-free-gift-card-game-hack In PDF document text
    • http://atrax.hr/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-generator-no-surveys-and-no-human-verification_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/fireboat-dynamic-ship-simulator-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/hack-para-todos-los-juegos-de-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/roblox-cheat-engine-noclip-script_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/hack-master-coin_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/hack-para-roblox-tycoon_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/robux-hack-2021-free_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/claim-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/febuary-2021-roblox-hacking-client_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-hack-without-verification_GM406889139.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_off00002fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBF 22172 bytes
SHA-256: cc9a3e65b0242426eea4387fc9f153e469b09d9fb0a448f54b7fa9810f8cf2f5
font_01_sfnt_off00006105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 19112 bytes
SHA-256: 9469897dff8cab28ffda57ea4fb04243aaf5b849cb1d333b453ecf02c9debdd7

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