Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8f12dd65b0b57d…

MALICIOUS

PDF

50.2 KB Created: 2021-06-03 23:01:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 545e49667b0890520f43bbd4444fc121 SHA-1: 82461a434afbd475c425d8dade47562bae3b77b9 SHA-256: ab8f12dd65b0b57df59d4218cce3c6a3323d1c64c4650a7863f4a2f88d72bead
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically disguised as 'game hacks' or 'free generators'. The primary malicious URL identified is https://netcdn.online/app/431946152/rewardrobux-com-game-hack. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the PDF structure and embedded links suggest it's designed to trick users into visiting malicious sites, likely leading to further exploitation or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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/rewardrobux-com-game-hack In PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/tiktok-free-view-iphone-6s_GM835599320.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/can-tiktok-free-view-bot_GM835599320.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikeshamzar.ac.id/repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005384.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5384 27308 bytes
SHA-256: 1b4963749caa5cb41022480501f9ae8165f733399ee7e3b290672beb9bc8298d
font_01_sfnt_off0000936c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA07D 18676 bytes
SHA-256: 7669e564bd091b207fd11e388173a1fc76ed62ef873f42ab23981861f0020ac0

Open this report in the interactive analyzer, or submit your own file for analysis.