Malicious PDF — malware analysis report

Static analysis result for SHA-256 30424f37eecb4e0f…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 19:41:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c6d47cbe87a68d30ae94479e93bcc0b0 SHA-1: cdb9a43d32ccefb2085bb2ff355e5d998f532625 SHA-256: 30424f37eecb4e0ffdd9917c7a20117299c94fe623f03548f6aa6a54945dd71c
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically a site offering 'free Robux' or game hacks. This is a common lure for phishing or malware distribution. The ML classifier and specific PDF heuristics strongly indicate malicious intent, likely to trick users into visiting a compromised site or downloading a secondary payload.

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.tw/app/431946152/roblox-games-that-give-you-free-robux-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-hack-in-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/202100-robux-promo-code-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/pubg-uc-generator-without-human-verification-2021_GM1330123889.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-other-peoples-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-alternatives-to-roblox_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/yyoutube-robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/tbc-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-cheat-speed-run-4_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/is-minecraft-java-edition-free_GM479516143.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_off00002fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCB 21988 bytes
SHA-256: a2fb5126939dc5a3a361d04ca41f27888e3b1030534224305e68c9ea1f794acc
font_01_sfnt_off0000606d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606D 19716 bytes
SHA-256: a049f91da2a5f673ee8bdddb66e04ab16341ee881dfe876bfe6c1856da68d744

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