Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa23a3137537837a…

MALICIOUS

PDF

48.6 KB Created: 2021-06-04 04:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 377db24a12aaf82c07b804d858710581 SHA-1: f808dc654bfdd4b07617b9ba1023d673f04ce2b7 SHA-256: fa23a3137537837a1ff240f77bd124e100ebf2e9badceb84749ef70e864000ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'free generator / game hack'. The document body, though partially obfuscated, contains similar lure text and the malicious URL. The primary attack pattern involves tricking the user into visiting a malicious site via a deceptive link, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/how-do-you-get-roebucks-for-free-game-hack In PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/pubg-uc-free_GM1330123889.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-link-blogspot_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_off000052f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F1 25140 bytes
SHA-256: 3e931a23335414b86514c629d5841380d9bb9262558be07804c431cb5b44c9f2
font_01_sfnt_off00008d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D51 4044 bytes
SHA-256: 40d6312b18609065d6ff1589747212aebbfd0d7c25a7a2979e9417769314f426
font_02_sfnt_off00009a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7B 18572 bytes
SHA-256: 9b0926f851b5352a1c94160dd5570857b20d788284ad3dea1803889ab4bbc101

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