Malicious PDF — malware analysis report

Static analysis result for SHA-256 304dbc8a8a955573…

MALICIOUS

PDF

35.7 KB Created: 2021-05-21 11:33:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1daa452e714116069a5d571b21e25985 SHA-1: a600d295e57f056fa588e82bbca86d12a6f69bc2 SHA-256: 304dbc8a8a9555737493acd9ab6d52ffc540c939111eca41c28208d2f3e5650e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as generators for popular mobile games like 'Coin Master' and 'Roblox'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of these links. The document body and embedded artifacts suggest a lure to entice users to click these links, likely leading to further malware download or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/twitter-coin-master-free-spins-game-hack In PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/play-games-for-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-gold-cards-free_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
stream_002_off000033a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A7 24796 bytes
SHA-256: 049cb0331c5f70159e7ec8145e5f86a1722cbbe291b5d84eb8d10e528844a7aa
font_01_sfnt_off00006ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE0 18052 bytes
SHA-256: 06f68ec0900a8a665d0c319e95253c201ab611d648accf1df96cbabceb79519f

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