Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4575c3b735f3efe…

MALICIOUS

PDF

43.5 KB Created: 2021-05-13 21:42:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b2e3078017ecb21a347e4cc64820be25 SHA-1: 52c8b1afa4bb94a5406990f3d795a2f63f5b544e SHA-256: c4575c3b735f3efeb116a4282db40e784b4297222cd744fb092b3e915aa3d011
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for an external URI, all pointing to sites offering game-related cheats or currency. The ML classifier also flagged the PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded links and the nature of the lures suggest an attempt to trick the user into downloading a secondary payload, likely related to the game cheats advertised.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/www-rbx-com-game-hack In PDF document text
    • https://scraperite.com/images/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-website_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/games-for-robux_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/robux-match_GM431946152.pdfIn PDF document text
    • https://scraperite.com/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://scraperite.com/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://scraperite.com/images/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000466c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x466C 28236 bytes
SHA-256: fb463337ab0c89e889658653b9fc7ad39170e9927f2b784b74e32afd2e75220f
font_01_sfnt_off0000876b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x876B 18332 bytes
SHA-256: 03a37bf507e0cad9bcf1387ae82c646cdce41af5350e7d54064c0facdd896ae5

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