Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55add941a57f29f…

MALICIOUS

PDF

35.6 KB Created: 2021-06-23 00:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 064fd8e040fa30ff96158a4358615a93 SHA-1: e34c57294fd2b99606771d022950cdb986c6f3f5 SHA-256: f55add941a57f29f663afeb6614989168d3f9e7c5736fa349299dd1d3e663870
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free in-game currency or hacks, directing users to a known malicious redirector. The document contains multiple embedded URLs that likely lead to further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

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.co/app/431946152/free-robux-no-human-verification-and-no-application-2021-game-hack In PDF document text
    • http://hk-kan.org/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-a-roblox-account-2021-september_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-robux-infinite-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-for-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-free-hat-obby_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/one-for-all-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/counter-blox-roblox-offensive-hacks-wallhacks_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/safe-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/money-money-roblox-free_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-robux-for-free-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_off00002eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB8 23144 bytes
SHA-256: 07cc2de57e79dc691c38730f57f2e8b49d61c16660c1a3f346e5df365108278f
font_01_sfnt_off000062e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E1 20160 bytes
SHA-256: 0d1275ed9c369cbf7dcc6e4d111c401bb088f2021318ab9396820ca2ad98bf34