Malicious PDF — malware analysis report

Static analysis result for SHA-256 2556ba903d907760…

MALICIOUS

PDF

33.7 KB Created: 2021-06-30 13:07:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b87e075d37e5c2393281bfe37b4f6073 SHA-1: 6c6015530c987cb1d0dd85d40c6ec96f4c89450f SHA-256: 2556ba903d907760a08f5c3163b9033e88cda4a3634a55bc78d77de02f6f4238
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and items to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-get-a-free-bugatti-in-roblox-jailbreak-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-csgo-cases-fre_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/hack-roblox-site_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-in-game-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/ispoofer-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00002abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABF 22732 bytes
SHA-256: fe307f7a27df20eadf13daafb5f8a20b9f69b22d2a5b0ba1635657a57c167813
font_01_sfnt_off00005d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 19516 bytes
SHA-256: 94033bd9643d2fd413022384f7309b0540eb17ee5460fc341e0eba23eca89235

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