Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fbbd2b52466c67…

MALICIOUS

PDF

33.0 KB Created: 2021-07-04 21:25:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ed4c9ec571694a58ffab20ef78858fdd SHA-1: 605e39c2db343c869e64635df4a9c808050c5915 SHA-256: e1fbbd2b52466c67741c55463bac22a6a7ea1f41d88c9b06657e7af1d3f145da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a critical link to a known malicious redirector at http://netcdn.tw/app/479516143/minecraft-hacker-skin-game-hack. The document body and embedded links suggest a lure for game-related hacks, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-hacker-skin-game-hack In PDF document text
    • https://mbbs.hr/files/roblox-hacker-outfit_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/gear-me-hack-roblox-november-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/robux-for-free-quick-and-easy_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-robux-hack-no-survey-youtube_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-hack-roblox-accounts-2021-windows-10_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-free-nuevo-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-cs-ro-hack_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/turtle-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/best-way-to-get-free-robux_GM431946152.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
font_00_sfnt_off00002e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8E 22020 bytes
SHA-256: b152a6a5dfa804a3ea20d10231910ea6cc67634be75df9c868023d7c47c06d08
font_01_sfnt_off00005f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 18024 bytes
SHA-256: a7bd85aded9e794133e08073d83a45875edf97b13575354264ab13ae1688af66

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