Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c7cd22cad84cbf…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 18:16:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c762638395decbb7faabd24a01df2a1e SHA-1: d172dc44fbe5090e908a369159162832aaf55d82 SHA-256: a2c7cd22cad84cbf2e0f086db9068b8f30ff2b5ff3e508a708698e056a5620dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generator' and 'game hack' lures for popular games like Coin Master and Roblox. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to drive traffic to potentially malicious sites. While no scripts were extracted, the PDF's structure and embedded links are indicative of a social engineering attack.

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/406889139/coin-master-free-spin-and-coins-links-game-hack In PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-on-roblox-app_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-redeem-code-hack_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/rbx-free_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-hacker-john-20-000-robux-gems-jarvascript-free-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/eviction-notice-roblox-hack_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-without-buyin-anything_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-hack-robux-download-pc_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-on-pc-windows-10-2021_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_off0000315f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315F 22500 bytes
SHA-256: 6f34671953a6f19aade384ccbd1238bf46b71e9d4066964ad3c0220f5b4187f4
font_01_sfnt_off000063bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BC 18520 bytes
SHA-256: d69a0a2edd95f9e38b96bcbf992a69ddda142703a71f9cfee81eaec1a075863f

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