Malicious PDF — malware analysis report

Static analysis result for SHA-256 158708645d824ec3…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 22:16:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b94e35086d1b0093804f6828c45d0395 SHA-1: bdc8ffcc2e48d56c47517f293c07cd0bbabef0da SHA-256: 158708645d824ec346cd9a7d04fc772c5d8e1885a40839aec0c0c9c40ecf78c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a prominent link within its body text, all related to obtaining free in-game currency or cheats for popular games. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or to redirect users to potentially harmful sites. No scripts were extracted, but the presence of multiple suspicious URLs suggests a social engineering attempt to trick users into visiting malicious websites.

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.tw/app/835599320/get-free-tiktok-followers-game-hack In PDF document text
    • https://i-tech.ac.id/perpus/repository/has-roblox-ever-done-free-robux-events_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-in-roblox-2021-easy_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/hack-de-roblox-para-conseguir-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-phantom-forces-cheat-1-milion-credit_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-emojis-that-work-on-roblox-servers_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-no-buying-anything_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/esp-roblox-hack-arsenal_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/asshurt-roblox-multitool-free_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/robux-hack-game_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-hack-roblox-accounts-agust_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-clothes-site_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/robuxmaniac-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-download-ios_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/cheat-engine-roblox-20212021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/pokemon-ultra-brick-bronze-roblox-free-shiny-umbreon-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/2-characters-from-roblox-standing-together-copyright-free_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-phantomforces-flame-cheat_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-picture-that-makes-a-tshirt-look-cool_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_off000030a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A0 22212 bytes
SHA-256: b30ac24593f80790ec9f04bc312ba390cee0a653b620cce43897312ede089278
font_01_sfnt_off000061cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 18208 bytes
SHA-256: d6dc0fe96375bf479973c15f4dc80cb5149eb13cbf7121a6896fdf070428f5c7

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