Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a3e59ccb92a15d…

MALICIOUS

PDF

46.1 KB Created: 2021-05-19 01:14:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7daecc9d9590a71277b5a3f9fc10a22c SHA-1: 1b4eb9e8266e6bf56fe330eb1d467f9c07fb5d91 SHA-256: 62a3e59ccb92a15d7bed028f40a024c23200702ed59ef69766f926c8a555b351
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a game hack generator. The document body and heuristics indicate a lure for free game items, likely to trick users into visiting the malicious site. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-tiradas-gratis-2021-game-hack In PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/install-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/robux-giver_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/rewardrobux-com_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B12 25168 bytes
SHA-256: 6c363c794707328db68d8a4fbea3efdbc8cea78c6d3d9a55db8b71cde57124ee
font_01_sfnt_off0000841e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841E 3984 bytes
SHA-256: f7f2f14bacc94d6c7a946217a9bb5f97f98628174aed7ec36ea3a4f89bef9922
font_02_sfnt_off00009204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9204 18120 bytes
SHA-256: df7c0bd6e0b176154b85c97f6bc04aa0c4a07bedf55487f170f3c6ac2e88131a

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