Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b215975c644a64…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 11:01:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0bf60fdf25a7889569b5dd56942fba41 SHA-1: 34eff73e8e65b8744073ae00ac71f7bb1114e4bd SHA-256: 74b215975c644a645cc88f14a7eec9ed7c7b0cd4f146d10ff02aa3968b65bd94
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and document body text that lure users with promises of free game items and accounts, such as 'free robux' and 'game hack'. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of multiple embedded URLs and the ML classifier's high confidence score support this assessment.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/free-roblox-accounts-dantdm-game-hack In PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-hack-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-no-survey-or-password_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/roblox-highschool-cheats_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library//repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://stikesyahoedsmg.ac.id/Digital_Library/repository/codes-to-get-free-robux_GM431946152.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
font_00_sfnt_off00003135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3135 21764 bytes
SHA-256: c36040d93a531ccc52f57c842811cd1237b90423c0cf4aecb86b579f992aa346
font_01_sfnt_off00006131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6131 19496 bytes
SHA-256: 1d8f3c67054186b686ad4a86e9ddd0ec27f19fef46b011e4e05e77984f0b9b58

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