Malicious PDF — malware analysis report

Static analysis result for SHA-256 db69aaef2a113f01…

MALICIOUS

PDF

33.7 KB Created: 2021-06-25 13:27:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9ea449a3bfc252ca0b0a852ecc67c57f SHA-1: f31e66111ec76fe9bf0ad4fec50fac29305c521c SHA-256: db69aaef2a113f01d9e209801a52444bc351084fd70a1800231bdb447d2a3185
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for free in-game currency, which is a common social engineering tactic. It embeds a link to a known malicious redirector, http://netcdn.co/app/431946152/free-robux-obby-game-game-hack, that likely leads to a second-stage payload or exploit. The ML classifier also strongly indicated maliciousness.

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/free-robux-obby-game-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/https-robloxcom-catalog-202120215-hackerhackerhackerhacker-rbxp-202120214_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/bloxburg-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-cookies_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-free-items-obby_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-hack-ulimited-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/microsoft-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
font_00_sfnt_off00002dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC5 21900 bytes
SHA-256: e112372f0994111bc9cb8e233154bc41596d476de61b0aed623ceae86891fa69
font_01_sfnt_off00005e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E21 19156 bytes
SHA-256: 1bc9f1f5d08321b9b9200e34f881ac61b35c9b542879324afa6e0731ff6f2039

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