Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5bdab1b9151fd3…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 10:01:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f022cb215b0515191e4ae53701f89436 SHA-1: c47ecb2f18798b716a4c75f943e10c41152952ac SHA-256: 4e5bdab1b9151fd36352021298b2676a1234067d625fe213ddb312f7362e94a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and potentially malicious files, disguised as 'free generator' or 'game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-2021-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

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/431946152/how-to-get-free-robux-2021-game-hack In PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-roblox-accounts-with-robux-on-them_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-roblox-coins_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-robux-without-no-verification_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-do-i-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/robux-hack-911-pastebin_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/roblox-ultimate-driving-westover-islands-how-to-get-free-cars_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-get-free-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/roblox-hack-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-get-free-minecraft-alts_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
font_00_sfnt_off000030f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F3 21680 bytes
SHA-256: 1195356408751d61cf48a882af3e158afd138e6d2000ca8703baf51910746c69
font_01_sfnt_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 19384 bytes
SHA-256: 140efaa19506918d6e23c6f72929d04436b836b18eb9dc717a4a442c24a9fe38

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