Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80b9c4674b31fd1…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 14:12:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8716064f9df5358c53f3257bf24bc954 SHA-1: 104d9ba7b17b1b5517161eba970100eb00aceb3e SHA-256: a80b9c4674b31fd17b1fa17685442c5567bc32bffe04995ae6d5fa312ba9f1ad
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one pointing to a malicious redirector at 'https://netcdn.xyz/app/431946152/roblox-bux-free-game-hack'. This redirector is likely used to deliver a second-stage payload, potentially exploiting client execution vulnerabilities. The document body and heuristics indicate a lure for game-related cheats or currency, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/roblox-bux-free-game-hack In PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/easy-robux-generator_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_off00004cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD8 24516 bytes
SHA-256: e60bc5b7f8c760d952cabd7565da16cbe8bc2db8727c6b33d07171b903561fde
font_01_sfnt_off0000851f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x851F 18088 bytes
SHA-256: b1a1c5aa5d70c9a0c9451475d1836048e8ca34dc29aa31eabf35c019fc4d80ab

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