Malicious PDF — malware analysis report

Static analysis result for SHA-256 c735b416616ba124…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 00:31:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ffe3e71a4994faa5f8f8ceaa0203bd91 SHA-1: e4bee3ebc27bccbb19d081d0d059227368ebcf87 SHA-256: c735b416616ba1247f012731fa527d0cc2864d83daf4a5d6632f2b1aa1cf436d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a direct link to a URL that is flagged as a game hack redirector, strongly suggesting a social engineering lure. The document body and numerous embedded URLs reinforce this theme by referencing game hacks and free in-game currency. No scripts were extracted from this sample, but the primary attack vector is the malicious URL provided within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.tw/app/406889139/coin-master-apk-hacked-3526-game-hack PDF link annotation
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-hack-on-club-boates-roblox_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-cheat-rs-in-roblox_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-free-robux-in-obby_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/wurst-18_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-hack-roblox-on-iphone-6_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/appkarma-free-robux_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/coin-master-free-spins-and-free-coins_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_002_off0000303d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303D 22536 bytes
SHA-256: fe740e25d91a0da4b0ed44a5fa1177bce01a2319e050fdcf79ba247a7f2396ee
font_01_sfnt_off0000628a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628A 18952 bytes
SHA-256: cc64386860e28c7a5bda04069eb4bd080ed1959d90d23f8bc3188d8a17878c18

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