Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0d14ff81bd6e15…

MALICIOUS

PDF

46.6 KB Created: 2021-06-08 08:35:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a28995a37601f31acb8b701a663ccfbb SHA-1: 55a31075f96c3a2ef39e2749b2de265453d368d1 SHA-256: 0b0d14ff81bd6e157df555feb2efa3692bc69f1c0d391457d3cbedc0e6d31c17
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links, identified as a link farm, that direct users to websites promising game hacks and cheats. The primary lure URL, 'https://netcdn.tw/app/431946152/roblox-cheat-engine-lumber-tycoon-2-money-hack-game-hack', is designed to entice clicks. The presence of a 'download button' heuristic further suggests a malicious workflow aimed at tricking users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/roblox-cheat-engine-lumber-tycoon-2-money-hack-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/2021-robux-hacks-no-games-to-be-played_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-unlimited-spins_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
stream_004_off00005367.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5367 25840 bytes
SHA-256: 1af1e273b9d4007aee58f9f43a210f66c62ba21ff8ed1f52ab5b8c066a2800d7
font_01_sfnt_off00008f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F87 19760 bytes
SHA-256: 1c6c07f5b78b14dc363edc2dc925fec5c1809314da9ba2a2ea3313b107d07501

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