Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e3a2d92a277567…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 06:37:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4a9b2f14476d6b9760a34be7220d1b22 SHA-1: d1ee7d500c0dfd7283217d1a2afc317525214874 SHA-256: d7e3a2d92a277567d934b2b124656f10824f4804f1f146668457d0802ef85fd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising game hacks and free in-game currency for popular games like Roblox and Coin Master. The document body, though partially corrupted, contains references to these lures and directs users to URLs such as 'https://netcdn.online/app/431946152/how-to-hack-roblox-jailbreak-game-hack'. This indicates a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/how-to-hack-roblox-jailbreak-game-hack In PDF document text
    • http://mb-alati.hr/files/pubg-uc-2021-online_GM1330123889.pdfIn PDF document text
    • http://mb-alati.hr/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/roblox-but_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://mb-alati.hr/files/roblox-free-body-bundle_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.mb-alati.hr/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://mb-alati.hr/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mb-alati.hr/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://www.mb-alati.hr/files/free-minecraft-codes-2021_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
stream_004_off00004f6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6F 25028 bytes
SHA-256: 5c16c6d7ee8f505a0e000c7b92538775a3eca2d98f34565b4f76b60f80d715a9
font_01_sfnt_off000088da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DA 18632 bytes
SHA-256: f85879c678901057cc908d94130b71f9fb6e8ee5be1c9db29d303049c5d159a2

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