Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d981b932988ac3c…

MALICIOUS

PDF

45.0 KB Created: 2021-06-10 14:39:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0c0f0591d171d54e7c135db57d423bc0 SHA-1: 69a36fc70dcde062858bebb44de7bab3cd116bb5 SHA-256: 0d981b932988ac3c2c94d53b8e2ea3af2ca5777bd65da9c46490f60dd2cc4f9b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for a game hack, presenting a fake CAPTCHA and a download button to trick users into clicking a malicious redirector URL. The document body and heuristics indicate a social engineering tactic to drive users to potentially malicious content. No scripts were extracted, limiting the analysis of further execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/assassin-roblox-hack-2021-game-hack In PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-download_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/htpp-free-robux-space_GM431946152.pdfIn PDF document text
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-windows-free_GM479516143.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_004_off0000519a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519A 25444 bytes
SHA-256: 2a1baafb59c076ff46dc19fdc80433c976af354da86464584b5da10219062aef
font_01_sfnt_off00008bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC4 18704 bytes
SHA-256: fa057005388f2168a8e6cd10aadb242f5b4d65977fb79ee6ab985cdb02ed4d09

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