Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57992fc524dfefa…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 12:10:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bfbf70621c2ec594e63c1c174f78db90 SHA-1: 74183271e0be93c68e194ff5cd875fa7c847a2a9 SHA-256: a57992fc524dfefacf36024f0510de2f6ae741899058ac3ecfb229534dcd2688
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary URL, http://netcdn.tw/app/431946152/ways-to-get-free-robux-2021-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

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/ways-to-get-free-robux-2021-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/robux-app_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/pubg-700-site_GM1330123889.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-roblox-using-xcode_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/www-coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-app-roblox-play-as-a-guest_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-pins_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_off00002f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9D 22200 bytes
SHA-256: 298f94c9406e652122edd1164e0e75ea2ff9fcfba798004d1ce490799b38398a
font_01_sfnt_off00006087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 19600 bytes
SHA-256: c00d54827bcee88cdbe96b013b7ed3ba2b531ed1e4e5548e429b871c3375097c