Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1850000db141f22…

MALICIOUS

PDF

33.9 KB Created: 2021-06-28 17:20:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f29dcdd9b15fb8498f0501f965cba4c3 SHA-1: 74b80571692f6eba76240975ed49347d8d8e8677 SHA-256: c1850000db141f22a32ce0f1633e077f1a77c641c2072a71c1b2ff9088dd1f3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, specifically advertising 'free generator / game hack' content. The document body reinforces this lure by mentioning 'Roblox Free Robux Hack Code'. While no scripts were extracted, the presence of malicious redirector links and the lure strongly suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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/roblox-free-robux-hack-code-game-hack In PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-vip-server-roblox-anime-battlegrounds_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-codes-2021-not-used-october_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/prison-life-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/stickmasterluke-100b-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/pokemon-go-free-online-game_GM1094591345.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-skybox-changer-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-what-to-do-when-hacked_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-a-game_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/claim-free-robux-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-para-roblox-2021-abril_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-cheats-for-tix-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/cheat-roblox-menu_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_off00002f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5A 21776 bytes
SHA-256: 42c83ada3c779cb2e7ec8b51f76888ef9bec77dd240da4b59ce73fb5cc030c33
font_01_sfnt_off00005f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 19132 bytes
SHA-256: 558d2d00ca60a40866a017f54d9909b8d22f0f1b4a598c8fb4737af2f7195799

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