Malicious PDF — malware analysis report

Static analysis result for SHA-256 661411b1c849d0d9…

MALICIOUS

PDF

36.2 KB Created: 2021-05-21 10:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: badbd7b85bcc62b135a63302725d3834 SHA-1: 658d1b44ef1a14cda90641268405dcceb963aeab SHA-256: 661411b1c849d0d92b45ae468536c44fa35a1b185e1480b3951df435af5f18c4
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising "free generators" and "game hacks" to entice users. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the links and the lure suggest an attempt to exploit users into downloading further malicious content or visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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.xyz/app/479516143/can-i-get-minecraft-windows-10-for-free-game-hack In PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://youtuIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30EE 25808 bytes
SHA-256: 87c02dc9b2445add393a3d9317cfe270271cb6b663e16f13552998af71b712c4
font_01_sfnt_off00006b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B66 18524 bytes
SHA-256: 6ac3bcb80c7412b4530c4d4c769bc132649d8002d05e49718f259242a5c40259

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