Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d2874b58c9e69fb…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 10:15:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4fa7784735f0cbbb47aa97bef927b1f4 SHA-1: aa8ba34893f3d6634f40b9ffe67c7e4fa65dd002 SHA-256: 5d2874b58c9e69fbd6b559c4de27b6783e1dad3cb011ed152c03c22e3b9a7f2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-free-coins-app-game-hack. The document body and embedded URLs suggest a lure for game-related cheats or hacks, a common tactic for distributing malware. The ML classifier also strongly indicated maliciousness.

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/406889139/coin-master-free-coins-app-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/hacking-roblox-with-brutus_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-admin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-in-eviction-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-hack-para-android_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-in-2-minutes-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-rbxbost_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-robux-in-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/can-i-get-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_off00003081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3081 22428 bytes
SHA-256: d2c22afd95e06bae12320a0ceacfcc4abcb84d387065a234857cbf094bd97b8c
font_01_sfnt_off00006282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 18176 bytes
SHA-256: 78fd92e643045a663d15c45c74126e1d779604aea3e1437bd5d883e9616c0973