Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c014bfce2d9445e…

MALICIOUS

PDF

46.1 KB Created: 2021-06-13 21:05:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b995f45e610cd2f38d67154693f95653 SHA-1: 5049e258d831befebf0151357e804cc5586a38b6 SHA-256: 4c014bfce2d9445e8764012d9b3524e5bfe1fbc7551cb2360edac95064688d3d
200 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free game hacks' and displays a fake CAPTCHA to trick users into interacting with a malicious link. This link, http://netcdn.co/app/431946152/free-unlimited-roblox-hack-game-hack, is known to redirect to malicious infrastructure. The document's content and heuristics suggest it is designed to lead users to potentially harmful sites, likely as part of a phishing or scam campaign.

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-unlimited-roblox-hack-game-hack In PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/get-free-robux-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005668.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5668 24808 bytes
SHA-256: 5ac8679aeaed079a0191698df3c1f82f14cdfda2e8ce360bc31a25ce6db5a20c
font_01_sfnt_off00008f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7F 19192 bytes
SHA-256: a972b2db20c50ac721ef0311e9c9b1e96ca7a972ed2a3f8ff5fc40e92d560d88

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