Malicious PDF — malware analysis report

Static analysis result for SHA-256 673f47d3c6fd6454…

MALICIOUS

PDF

37.4 KB Created: 2021-05-24 19:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c660b40aa450bf2027c129a90965f73 SHA-1: 22de9b2d81200977c6001df12c410c58f48214f4 SHA-256: 673f47d3c6fd645442eb68bd71ba30737726d67722223fa54b267e5e8f6c4a5f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including one explicitly identified as a 'free generator / game hack' lure. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded links and the nature of the lure suggest an attempt to trick the user into downloading a second-stage payload or visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-get-minecraft-for-free-ios-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-by-watching-ads_GM431946152.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
stream_002_off000034d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34D4 26908 bytes
SHA-256: 78582d7ab51e3d34c438b097b906abf8213ca75d830899c4424682c9afabd9b9
font_01_sfnt_off0000727c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 17872 bytes
SHA-256: f310131035db742f338f230ab2c5697c5d59cc25d8943e3e3339342bb09010ba

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