Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d597498898fc74…

MALICIOUS

PDF

50.4 KB Created: 2021-06-08 16:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c943aa8fa67c2d4ac76d8abac5dd5ac0 SHA-1: e92d1a69c43232416a401e6df7d5c526d25162f7 SHA-256: 59d597498898fc7482b4ea8af13d8b53a36dda4ff8c291ebb498b873f2d80304
200 Risk Score

Malware Insights

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

The PDF document contains multiple links that impersonate brands like Facebook and promise game-related benefits, such as free currency or hacks. These links redirect to malicious infrastructure, specifically identified as a redirector at 'https://netcdn.tw/app/431946152/hackear-server-roblox-game-hack'. The document's content and the presence of malicious redirectors strongly indicate a credential phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/hackear-server-roblox-game-hack.
  • 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 https://netcdn.tw/app/431946152/hackear-server-roblox-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/pubg-uc-ykleme-midasbuy_GM1330123889.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/pokemon-go-free-weekly-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-games_GM431946152.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
font_00_sfnt_off0000529a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x529A 27336 bytes
SHA-256: 13d33c9d396b465b16cbbf2be419428d4dc107b437bc0e464e8296440751fbf2
font_01_sfnt_off000090ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90EE 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off0000a25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA25F 18296 bytes
SHA-256: b01f44ef2521442d3b5ee138dcfcd8042c1043812ab0b66efdbff4479980f608

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