Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c8c672dd2493b1…

MALICIOUS

PDF

46.1 KB Created: 2021-05-19 15:05:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1adcabfa7f8c9157d9595c0fcb77ea1b SHA-1: 54ab3dd5864082f158a268e68bda7733bc617fba SHA-256: 14c8c672dd2493b1c2c716221de18a741a621d617a2aa71e0b6068dbe9e359a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising 'Coin Master Hack Online No Human Verification'. The heuristic firings indicate the PDF is designed to lure users to this malicious URL, likely to download further malware or engage in scams. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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-hack-online-no-human-verification-game-hack In PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/earn-robux-now_GM431946152.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_003_off00004d2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2F 24468 bytes
SHA-256: 436b70abc626830b7dcef418f70875f3246afddf71837faa710846d11eb377df
font_01_sfnt_off000084f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F6 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off0000917c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917C 18324 bytes
SHA-256: 44fb42a750761b479d1ff9d84c79b576d569f1302724d8c024f9fb96550a5546

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