Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d1975f52f6cbe6…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 14:39:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a913ce157c8cfa563b7ce0d9a16ec510 SHA-1: ab516be0f4cc8b5232ce1f9dab64372c4300f765 SHA-256: a4d1975f52f6cbe677920cacedbfb574a417956a8e5efa45d21ac99c19906791
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users into clicking malicious links. The document contains numerous external links, many of which point to PDF files hosted on academic repositories, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://netcdn.online/app/406889139/free-spins-coin-master-cheats-game-hack, which is likely used to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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 https://netcdn.online/app/406889139/free-spins-coin-master-cheats-game-hack PDF link annotation
    • http://lib.baruna-husada.ac.id//repository/without-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/pokemon-go-free-coins-no-verification_GM1094591345.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/tiktok-free-money_GM835599320.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000504c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504C 24484 bytes
SHA-256: 405e48972e76046c6707a3a41570ce4d655fd62ff6984958ca941d4589cca69b
font_01_sfnt_off000087f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F6 2868 bytes
SHA-256: 00109425b76763440a5569341faade0445b3c9f8514523a6f287fddbc9082efe
font_02_sfnt_off000091e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E3 18052 bytes
SHA-256: 646ed736691e24b0aca15324257056c8ac0b7af913b76a93602a047b34ada573

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