Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ca5c69e0631544…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 11:13:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f5edcbd8d491cd6163d4bcc6f0d4e38d SHA-1: f5cad5dc78cb63f3546b1ec61d27a282dfc09dcd SHA-256: 78ca5c69e06315440423bcfa5ceede3da7ac36cbe5dfc9d2f822bcce40f54b06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as offers for free game currency or hacks. The primary lure URL is http://netcdn.tw/app/835599320/free-tiktok-followers-no-human-verification-or-survey-game-hack. This indicates a social engineering attack aimed at tricking users into visiting potentially harmful websites. No scripts were extracted, but the presence of embedded URLs and the lure content strongly suggest a phishing or scam attempt.

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/835599320/free-tiktok-followers-no-human-verification-or-survey-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-games-no-scam_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/www-robux-us_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/pubg-uc-100-bonus_GM1330123889.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-critical-strike-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-no-money-needed_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/como-hackear-robux-facil-y-rapido-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-jackpot-hack_GM406889139.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_off0000320a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320A 22016 bytes
SHA-256: 8935a480501b8ed9be74673da60b24a6f4bd5f366d0b528193e741421c29f513
font_01_sfnt_off000062ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 19040 bytes
SHA-256: 71a2c29614c86359ac6f9d7488c26dbde8d9137987fdabb02d1dbf8af061703e

Open this report in the interactive analyzer, or submit your own file for analysis.