Malicious PDF — malware analysis report

Static analysis result for SHA-256 6081d2bacf1b6cc3…

MALICIOUS

PDF

43.6 KB Created: 2021-05-14 09:35:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 08d1f026afdf3eebf79bfa9dd94edf39 SHA-1: 78302d61926939a359a15b467261ccfdea1dcde3 SHA-256: 6081d2bacf1b6cc319ea4b6d54f3c5ed8303a4206f7bb8d144f01421fc211795
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically promoting 'game hacks' and 'free spins' to lure users. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-hack-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/how-to-hack-robux-game-hack In PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-link-download_GM406889139.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_003_off00004ace.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACE 26056 bytes
SHA-256: 89accd76845c3eff6b315276581cec04634c5921a9f2327b5e3ffa49b4dfdcb3
font_01_sfnt_off000087aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AA 18412 bytes
SHA-256: 799ae8847f356c5b4d712fc876b96dd84d848442331064266ecb6e470ae97e62

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