Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b94a22fbbe195d…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 23:17:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3a59dbb28b398c10a161629306a9b136 SHA-1: f6111b37379a05c2818f14b83ed2fd58a028f631 SHA-256: d8b94a22fbbe195d8a7cd8ed260c4980235304492ffec5fa32744b70c015b856
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are associated with 'game hacks' and 'free currency' lures. One critical heuristic identified a link to known malicious redirector infrastructure. The document body and extracted URLs suggest a phishing or scam attempt designed to drive traffic to these sites, potentially for malware distribution or further phishing. No scripts were extracted from this sample.

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/406889139/100-free-spins-on-coin-master-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-de-roblox-robux-espaol-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-have-free-skin-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-crashes-when-cheat-engine-is-open_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-coin_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/acop-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-games-that-really-work_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-version-coin-master-apk_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_off00002f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F99 22592 bytes
SHA-256: 0c61e0c5b023e1ae95dae2e945bda3987c8b54405d9cb87d8380efb7b52b0b88
font_01_sfnt_off00006209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 18452 bytes
SHA-256: 19b9cdf123661413ad3df9058e2ff653a57f7ce1122fd87799700f91452dab37

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