Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0a75658ab69b02…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 12:06:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a6ca936eb3595a1f29dcdb6c216f667d SHA-1: d554692aeca9c8b6f0fbc5eb90e04d8641de75c6 SHA-256: cc0a75658ab69b020d435f6b8d507c7fd9b6520eabd424610cffba5f73028806
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free currency. The document body and embedded links suggest a social engineering lure to trick users into visiting these sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection and potential for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/406889139/coin-master-real-free-spins-game-hack In PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/are-tiktok-free-views-hack_GM835599320.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/robux-offers_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-cheats-without-verification_GM406889139.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_off00005066.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5066 28036 bytes
SHA-256: 3629adc57cb49dbf9131b0a2f166aefa6ee00c1af8903f8542f7da8194ff79dd
font_01_sfnt_off00009045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9045 3228 bytes
SHA-256: f3cb21a2c58c98545df60c62f4e2b5cf4584d00c642a3cb5b89987787aefa173
font_02_sfnt_off00009b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8A 17960 bytes
SHA-256: 614295126cde334420460b671e97520ef00bc17125d6db356981682f81072261

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