Malicious PDF — malware analysis report

Static analysis result for SHA-256 210bcf37f6a88139…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 10:18:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a9fb2a4461906b5e3815629a239a05df SHA-1: c874160e534482690a4534fe97357171d3ba90c6 SHA-256: 210bcf37f6a88139b900a44001433261f03f9a53255f72f1eadd0c5d68b78aca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL, which is likely part of a phishing or scam campaign.

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/431946152/robux-com-free-robux-game-hack In PDF document text
    • http://library.umla.ac.id/repository/how-tom-change-birthday-on-roblox-under-13-without-hacks_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/what-tiktok-free-folowers-without-downloading-any-apps_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-50-robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hack-download-pc-dungeon_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-levels-dragon-ball-z-revelations-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-wiki_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-games_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/can-pokemon-go-free-evolution_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-hacks-2021_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_off00002ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECF 21640 bytes
SHA-256: cefc6d6122bfa0853414de241ea2866d297f4e52b01f69fdb534abb79997fcf3
font_01_sfnt_off00005eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAA 18976 bytes
SHA-256: 27896acad5ca474033774e3721745fbaf6546dbb33b60a4a93bb974a81ff43ff