Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab77849dc62964df…

MALICIOUS

PDF

35.4 KB Created: 2021-06-20 05:06:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8731714dd940d7fe10b465d576e087bd SHA-1: ddfb6a78dfd4af28c6a14030437a5827ae3dcb89 SHA-256: ab77849dc62964df29f06d84f93a43dbf6d04919f6b0c9f5220b996d5a17542e
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and currency generators. The heuristic firings indicate that these links are associated with known malicious redirectors and lure users with promises of free game items. The document body contains a primary URL that appears to be the intended destination for the malicious lure.

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.co/app/431946152/descargar-hack-para-roblox-robux-game-hack In PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/robux-hack-sin-verificacion-humana_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-items-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/jail-break-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-hack-for-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/minecraft-windows-free_GM479516143.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_off000034ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34EC 21912 bytes
SHA-256: ec0fb2215ab00bc815347f881c655634648687e8fff7a320983e948c65914998
font_01_sfnt_off0000653a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653A 19116 bytes
SHA-256: 1b580ea85371e215bfc2ecd4eff75fef5371c73b3c5d89b64d59af7bf8b889b6

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