Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7d3c41d095d531…

MALICIOUS

PDF

35.3 KB Created: 2021-06-23 00:13:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5213151d2e75d37b9ccd9e187b29e88d SHA-1: d7e90f0c07ad1f4dce9924116ee3a0326572b450 SHA-256: 1b7d3c41d095d531d5076c74c4215cdf2ec065ee40e18c76d904f916722c8591
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and game hacks. The primary lure URL is http://netcdn.co/app/431946152/how-to-get-free-robux-for-free-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of embedded URLs and the nature of the lure suggest a phishing or malware distribution attempt.

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/how-to-get-free-robux-for-free-game-hack In PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/robux-earning-websites_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-robux-no-survury_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/roblox-jailbreak-checked-cash-money-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/pokemon-go-free-3d-model_GM1094591345.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/i-need-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2palembang.sch.id/__statics/gudangsoal/files/hack-game-plus-com-coin-master_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_002_off0000319e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x319E 22888 bytes
SHA-256: 45b70b6a3bb276e012dccbee040e4ee83ce3857f5809f0916a1b399bc938f140
font_01_sfnt_off0000651e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651E 18984 bytes
SHA-256: b02f235e187ca63825268846ce24859b9c73d6f06522f0e44481555b58ecada8

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