Malicious PDF — malware analysis report

Static analysis result for SHA-256 5494425e19932c03…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 06:30:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8943d061b8257e29cc1de23d5a82ca2f SHA-1: 29a6f9cf0649e65e1329f65f0d730eb1dfbf8460 SHA-256: 5494425e19932c03dec44e482a63f67745952193fb90cbd81c5f02b3824c29ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and embedded URLs strongly suggest a phishing attempt related to popular online games, aiming to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/who-to-get-free-robux-game-hack In PDF document text
    • http://tehergumi.hu/images/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/earn-roblox_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/roblox-points_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/kachifpro_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-hack-coin-master-with-lucky-patcher_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_003_off00004556.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4556 29260 bytes
SHA-256: 3da0495b49f1e1284d0d3bfa70fca083b6aa2c7a378a144d576f42a9d2f7606d
font_01_sfnt_off000085c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C3 18484 bytes
SHA-256: 7ba6f7de64c6d8ae6f5469fb20d9bd46bb355649f5c0a9ce8a2cee34149577d7

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