Malicious PDF — malware analysis report

Static analysis result for SHA-256 210b1aaa1528dd19…

MALICIOUS

PDF

37.3 KB Created: 2021-05-25 11:32:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6b3a2da41f393a18dfb6a08ffa6eb6c5 SHA-1: 2dd25a17cd399571f03a4d55bbbf834eb7dc50b0 SHA-256: 210b1aaa1528dd191be349753542a8cb5069af0ca05e10998745a1b3a6da15f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a 'game hack' lure, specifically mentioning 'Coin Master' and 'Robux'. The heuristic firings confirm these links point to malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest it's designed to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/406889139/coin-master-free-spins-link-today-instagram-game-hack In PDF document text
    • https://elearning.man1tapin.sch.id/__statics/gudangsoal/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1tapin.sch.id/__statics/gudangsoal/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapin.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://elearning.man1tapin.sch.id/__statics/gudangsoal/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1tapin.sch.id/__statics/gudangsoal/files/roblox-hack-me-robux_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
stream_002_off00003685.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3685 24396 bytes
SHA-256: 3928e4a9383ee3121c4ea6e73b81ed0eb8909a83d61059adaafbfb96931b8dcc
font_01_sfnt_off00006e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8C 18960 bytes
SHA-256: c3cae131f36bdfe9c813bd150295f39ca0ceeabf3546a2df254cc03f93d9c6e3

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