Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a790d37b363add5…

MALICIOUS

PDF

41.6 KB Created: 2021-05-15 06:36:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 862fbf0b3222b1ebf5a0b418fc74e234 SHA-1: ef9a9cdd74d0c0b7add2fa5861b68d79d445bc02 SHA-256: 1a790d37b363add57085cb7edc795d285510eb4355f9ca374d7d6a53bcc56963
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and sites offering game hacks, indicating a phishing or scam attempt. The document body and embedded URLs strongly suggest a lure for game-related cheats, likely to distribute further malware or conduct credential harvesting. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-hack-coin-master-game-ios-game-hack In PDF document text
    • http://wsit.at/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/worst-client_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/www-robux-com_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A7 25436 bytes
SHA-256: 69d493f4d8e1926fb142ece7eea8622a2b1a003fd6ad35dfbec42ebe417d11f7
font_01_sfnt_off000080d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D5 18140 bytes
SHA-256: b80dece7d8ec4d9222cf5aed29a2a21d72ad5f5cbe697ae1d456d8a38991e3ed

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