Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a77d5f8020cc4ed…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 17:00:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f17c3f78953ca3e6e4d316b6b01d81e1 SHA-1: f8eb2eeac7b9d8216576b344d3d8ab89b3a279dc SHA-256: 3a77d5f8020cc4eda4a056d352518109c1ae31190da8aabde86213976f8ac786
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/479516143/is-minecraft-vr-free-game-hack. These links are presented as lures for free game hacks and currency, indicating a phishing or scam attempt. The document body and embedded links suggest the primary goal is to redirect the user to potentially malicious content or further 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/is-minecraft-vr-free-game-hack In PDF document text
    • http://projectunionstreet.com/library/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-join-anyone-on-roblox-without-hacking_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/master-coins-free_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-command-prompt-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/archmage-roblox-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/5-hacker-fampsos-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-games-like-roblox-for-chromebook_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-spin-codes_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_off00003164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3164 22172 bytes
SHA-256: 513ef8406d92ad2901a65a251096c8d02e63c9c64f33f3bb5571614de321f131
font_01_sfnt_off0000627a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627A 17988 bytes
SHA-256: b0ced143575b158626b16a0b912dcaafc45e1ef0ad694bde4acea2ec78676362