Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afc0a974e3e2031…

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 16:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8ac0a0d67fc11287bb8d92c1cdb6b1b SHA-1: b7659a56e0e376521a4f2403c51dc1cc59c71f08 SHA-256: 2afc0a974e3e2031086f76138f5ebbfd01b4f2f5473ef21a3a796ee96659e3bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual call-to-action, masquerading as a link to game cheats or currency generators. The primary URL, http://netcdn.tw/app/406889139/haktuts-coin-master-free-spin-link-game-hack, is likely used to deliver a malicious payload. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/haktuts-coin-master-free-spin-link-game-hack In PDF document text
    • http://tehergumi.hu/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-for-ipad-free_GM479516143.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_off00002abe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ABE 23760 bytes
SHA-256: 0f5a77ad9aaa401a2652f5c6551ae8a4e43be8dbd8aac719f896f021a7ab30ab
font_01_sfnt_off0000607b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 18196 bytes
SHA-256: d21f7c9777ff22c572caba6bc61bff535e054503ba9d308437b2513133ac2854

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