Malicious PDF — malware analysis report

Static analysis result for SHA-256 582584790c166c0c…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 08:29:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8e3037599cc2b9de08c046fb1876fbff SHA-1: 9a9fb8b1b91aa54232b07b8cc658bdaf67887f00 SHA-256: 582584790c166c0c39d0beb0334de133538fe18fc432e4caa65ec010e57b3230
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure related to game hacks and generators, redirecting to malicious infrastructure. The primary malicious URL identified is https://netcdn.online/app/479516143/scaffold-minecraft-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/479516143/scaffold-minecraft-hack-game-hack In PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/robux-redeem_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://rkh.go.th/ckfinder/userfiles/files/minecraft-life-hacks_GM479516143.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_004_off0000512b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512B 24456 bytes
SHA-256: d2d836ecf3dd228030cdf0f315745b5d71f6019cfff1fff58cf06d8abf4cce6a
font_01_sfnt_off0000891e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891E 4636 bytes
SHA-256: 397d5ab575e929e4abcc863b1f0efbb5bdbad67b5742972067ef073117fe64ce
font_02_sfnt_off00009878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9878 18128 bytes
SHA-256: f7370529bf904c5857fe4eab30760dda605e07161f807833dcc82124085588a2

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