Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb360b585b2d482…

MALICIOUS

PDF

36.0 KB Created: 2021-06-26 08:22:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ad1e74a16dffb435c46831f362c418a9 SHA-1: 9a796256d740c39ff281a02f8e994c45beccb94e SHA-256: 3cb360b585b2d4820afd7098090ac5baa7ed9081056db924233a16ead453d8ca
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link disguised as a 'game hack' or 'free Robux' lure, which redirects to known malicious infrastructure. The document body and embedded URLs reinforce this theme. The malformed stream length heuristic and ML classifier indicate exploitation, likely for client execution via a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/431946152/10-games-that-give-you-free-robux-game-hack In PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/roblox-zombie-rush-hack_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/roblox-build-to-survive-the-zombies-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/how-to-get-roblox-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/earn-free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/google-roblox-items-free_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_off00003448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3448 22052 bytes
SHA-256: fb540f5b5aa7ffb55f49008569da51d7a83b2971585dd4bee602c41b8d137c1a
font_01_sfnt_off00006533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 19920 bytes
SHA-256: 0dd4b6d9bdc4a9bcd980df300f5bf607a948cd94ff75f78201b8ff587b27ff1b

Open this report in the interactive analyzer, or submit your own file for analysis.