Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1d728784ecc1a0…

MALICIOUS

PDF

35.7 KB Created: 2021-06-19 18:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6b032fd8806682971ed1d0b74e049831 SHA-1: cd1b06afb7f341482ea26904ec173a181a7cbf47 SHA-256: 4e1d728784ecc1a030a7b32094cc82b40caeba12e83e164ab990463fc2d40706
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is designed as a lure, employing game hack and free item offers to entice users. It contains a high density of external links, many of which point to other lure pages, indicating a link farm strategy. The primary URL, http://netcdn.co/app/431946152/welcome-to-farmtown-roblox-cheats-game-hack, is a key indicator of the malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.co/app/431946152/welcome-to-farmtown-roblox-cheats-game-hack PDF link annotation
    • https://www.imagevideo.info/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.imagevideo.info/images/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-stuff-on-roblox-glitch_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/hacks-para-roblox-2021-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/free-tiktok-followers-royal-key_GM835599320.pdfIn PDF document text
    • https://www.imagevideo.info/images/how-to-trade-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://www.imagevideo.info/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/how-to-hack-sword-fighting-tournament-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/roblox-swear-hacks_GM431946152.pdfIn PDF document text
    • https://www.imagevideo.info/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.imagevideo.info/images/www-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_off0000322b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322B 23040 bytes
SHA-256: b702093aff86e7c903a4264660344fcb73bacfcd84e5fa1364bd386eddf31a06
font_01_sfnt_off000065df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65DF 19356 bytes
SHA-256: f859fe99a2b91651cb17aee28625d439b36645c5e9013e0a36e753fa7dda5cac