Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a4a2e615c41e0c…

MALICIOUS

PDF

44.1 KB Created: 2021-05-12 20:43:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 853ac6df439d9ea119e2a8d4b0ab8fd5 SHA-1: c4511504312e5bd3bdb7a3c9201abe2a1431cf90 SHA-256: 48a4a2e615c41e0cfa1a667a67fd2de5a10e583c42f249f8df557ecd8492985e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to redirector domains, specifically advertising game hacks and free resources for popular games like Coin Master and Roblox. The heuristic firings indicate these links point to known malicious redirector infrastructure, suggesting a phishing or scam attempt designed to lead users to potentially harmful websites. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/coin-master-free-spins-8-14-2021-game-hack In PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46EE 24260 bytes
SHA-256: 3166d00cd32a3a8a57ad29b48587931da5c562915abca74284cf591b1ebaf158
font_01_sfnt_off00007e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7F 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8899 18560 bytes
SHA-256: f1ba4453c868ed83d22267cb1b9d4b229844c2d7b0eeb3dea07fed1a48080353

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