Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc681e8a90a29ddf…

MALICIOUS

PDF

49.5 KB Created: 2021-05-16 14:36:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1246390cc4440fc095e02fc3091410ee SHA-1: cf65b235482a2fe3899a709a3ab8b1efdfc21250 SHA-256: fc681e8a90a29ddf526b695beeb75effd086a189249227f5257b2e81b46cc791
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with game hack content. The primary malicious URL identified is https://netcdn.xyz/app/431946152/i-got-hacked-on-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/i-got-hacked-on-roblox-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coinmaster-hack_GM406889139.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_003_off00004acc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACC 38048 bytes
SHA-256: c999d4cb72ada4fded7ecbbfeb60b326c6669a4d0c8d4ee2d537db127bda82e2
font_01_sfnt_off00009ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF9 18460 bytes
SHA-256: a8a49c36ef4b2531a5f792820ad3efe99a39c3e474aae1f279e7d577006455a1

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