Malicious PDF — malware analysis report

Static analysis result for SHA-256 91193fad73481d56…

MALICIOUS

PDF

34.7 KB Created: 2021-06-25 18:50:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dda30bad6ed308fa426962d31632a997 SHA-1: d23f50af00d2db4af8d7e60e9072ea861b099701 SHA-256: 91193fad73481d56fa1b89c267e676d1b9067cd899f26cde576add10b4df0562
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items or hacks. The document body explicitly contains a call to action to 'CLICK HERE TO ACCESS ROBUX GENERATOR' and directs users to a URL that is part of a known malicious redirect chain. 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/wahoo-com-free-robux-game-hack In PDF document text
    • http://dana1157.com/images/roblox-the-pizzeria-roleplay-remastered-how-to-get-free-tokens_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/roblox-builders-club-hack_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/roblox-necklace-free-shipping_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-codes-2021_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
font_00_sfnt_off00002fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA1 22416 bytes
SHA-256: 52e6f609d8fa6b78661e0f4fde550238e18c60df5492c0e3e3ed759dd0429e1b
font_01_sfnt_off000061e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E2 19340 bytes
SHA-256: bb8c43f59cd1374d55c35ae9feb2e25aaf3625b132afc54240c9e35488485033

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