Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5e5b5df8cbc189…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 15:12:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6c811f81f036f47c4379e0c0e24075c3 SHA-1: 0d28accb9f6b228ef778899196180f0e564b53ca SHA-256: 1b5e5b5df8cbc1896bd3b284578e234c571e54041037ca4f253038cfe7b94fba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "free Robux" or "game hacks" to entice users. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious websites, likely for phishing or to download further malware.

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/how-to-get-free-robux-without-verification-2021-game-hack In PDF document text
    • http://porownaj-laser.pl/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/robux-win_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://porownaj-laser.pl/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://porownaj-laser.pl/images/roblox-ban_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/get-free-robux_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_off000048ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EE 25028 bytes
SHA-256: 5117c82d02176eb2a97f5b98c78fdfbb880e9a5e742b1e67e22b4d2bdc684adc
font_01_sfnt_off000082db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DB 19528 bytes
SHA-256: 1b346556c7df455cb9a54b8f1a6e3f1a0bfffa2d9228fa0640c35d2bdb9db684

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